Anatomical terms of bone: Difference between revisions
image cleanup |
Citation bot (talk | contribs) Added date. | Use this bot. Report bugs. | Suggested by Whoop whoop pull up | Category:Bones | #UCB_Category 27/33 |
||
(84 intermediate revisions by 43 users not shown) | |||
Line 1: | Line 1: | ||
{{Short description|none}} |
|||
{{Anatomical terminology series}} |
{{Anatomical terminology series}} |
||
Many '''anatomical terms |
Many '''anatomical terms descriptive of bone''' are defined in [[anatomical terminology]], and are often derived from Greek and Latin. [[Bone]] in the human body is categorized into [[long bone]], [[short bone]], [[flat bone]], [[irregular bone]] and [[sesamoid bone]]. |
||
==Types of bone== |
==Types of bone== |
||
[[File:601 Bone Classification.jpg|thumb|right|400px|Different types of bone]] |
[[File:601 Bone Classification.jpg|thumb|right|400px|Different types of bone]] |
||
===Long |
===Long bones=== |
||
{{main|Long bone}} |
{{main|Long bone}} |
||
A long bone is one that is cylindrical in shape, being longer than it is wide. However, the term describes the shape of a bone, not its size. Long bones are found in the arms (humerus, ulna, radius) and legs (femur, tibia, fibula), as well as in the fingers (metacarpals, phalanges) and toes (metatarsals, phalanges). Long bones function as levers; they move when |
A long bone is one that is cylindrical in shape, being longer than it is wide. However, the term describes the shape of a bone, not its size, which is relative. Long bones are found in the arms ([[humerus]], [[ulna]], [[Radius (bone)|radius]]) and legs ([[femur]], [[tibia]], [[fibula]]), as well as in the fingers ([[metacarpals]], [[phalanges]]) and toes ([[metatarsals]], phalanges). Long bones function as levers; they move when [[muscle]]s contract.<ref name="Open Anatomy">{{cite web | url=http://cnx.org/content/col11496/latest/ | title=Anatomy & Physiology | date=25 April 2013 | publisher=Openstax college at Connexions | access-date=November 16, 2013}}</ref> |
||
===Short |
===Short bones=== |
||
{{main|Short bone}} |
{{main|Short bone}} |
||
A short bone is one that is cube-like in shape, being approximately equal in length, width, and thickness. The only short bones in the human skeleton are in the carpals of the wrists and the tarsals of the ankles. Short bones provide stability and support as well as some limited motion.<ref name="Open Anatomy"/> |
A short bone is one that is cube-like in shape, being approximately equal in length, width, and thickness. The only short bones in the human skeleton are in the carpals of the wrists and the tarsals of the ankles. Short bones provide stability and support as well as some limited motion.<ref name="Open Anatomy"/> |
||
===Flat |
===Flat bones=== |
||
{{main|Flat bone}} |
{{main|Flat bone}} |
||
The term “flat bone” is |
The term “flat bone” is something of a misnomer because, although a flat bone is typically thin, it is also often curved. Examples include the cranial (skull) bones, the scapulae (shoulder blades), the sternum (breastbone), and the ribs. Flat bones serve as points of attachment for muscles and often protect internal organs. Flat bones do not have a medullary cavity because they are thin.<ref name="Open Anatomy"/> |
||
===Irregular |
===Irregular bones=== |
||
{{main|Irregular bone}} |
{{main|Irregular bone}} |
||
An irregular bone is one that does not have |
An irregular bone is one that does not have an easily classified shape and defies description. These bones tend to have more complex shapes, like the [[vertebra (anatomy)|vertebrae]] that support the spinal cord and protect it from compressive forces. Many facial bones, particularly the ones containing sinuses, are classified as irregular bones.<ref name="Open Anatomy"/> |
||
===Sesamoid |
===Sesamoid bones=== |
||
{{main|Sesamoid bone}} |
{{main|Sesamoid bone}} |
||
A sesamoid bone is a small, round bone that, as the name suggests, is shaped like a sesame seed. These bones form in tendons (the sheaths of tissue that connect bones to muscles) where a great deal of pressure is generated in a joint. The sesamoid bones protect tendons by helping them overcome compressive forces. Sesamoid bones vary in number and placement from person to person but are typically found in tendons associated with the feet, hands, and knees. The |
A sesamoid bone is a small, round bone that, as the name suggests, is shaped like a sesame seed. These bones form in tendons (the sheaths of tissue that connect bones to muscles) where a great deal of pressure is generated in a [[joint]]. The sesamoid bones protect tendons by helping them overcome compressive forces. Sesamoid bones vary in number and placement from person to person but are typically found in tendons associated with the feet, hands, and knees. The only type of sesamoid bone that is common to everybody is the [[kneecap]] (''patella'', pl. ''patellae'') which is also the largest of the sesamoid bones.<ref name="Open Anatomy"/> |
||
==Protrusions== |
==Protrusions== |
||
===Rounded=== |
===Rounded=== |
||
[[File:602 Bone Markings.jpg|thumb|right|400px|Different types of bone markings and features.]] <!-- Leave the image at 400px in size, otherwise it will need to be split into three images showed at full to make the text readable--> |
[[File:602 Bone Markings.jpg|thumb|right|400px|Different types of bone markings and features.]] <!-- Leave the image at 400px in size, otherwise it will need to be split into three images showed at full to make the text readable--> |
||
A ''[[:wikt:condyle|condyle]]'' |
A ''[[:wikt:condyle|condyle]]'' is the round prominence at the end of a bone, most often part of a joint – an articulation with another bone.{{sfn|OED|1989|loc="Condyle"}} The ''[[:wikt:Epicondyle|epicondyle]]'' refers to a projection near a condyle, particularly the [[medial epicondyle of the humerus]].{{sfn|OED|1989|loc="Epicondyle"}} These terms derive from [[Greek language|Greek]].{{sfn|OED|1989|loc="Condyle, Epicondyle, Epi-"}} {{efn|Specifically, {{langx|la|condylus}}, from "knuckle" ({{langx|el|kondylos}}), with "epi" referring to "Upon".{{sfn|OED|1989|loc="Condyle, Epicondyle, Epi-"}} }} |
||
An ''eminence'' refers to a relatively small projection or bump, particularly of bone, such as the [[medial eminence]]. |
An ''eminence'' refers to a relatively small projection or bump, particularly of bone, such as the [[medial eminence]].{{sfn|OED|1989|loc="eminence"}} |
||
A ''process'' refers to a relatively large projection or prominent bump, |
A ''process'' refers to a relatively large projection or prominent bump,{{sfn|OED|1989|loc="process"}} as does a ''promontory'' such as the [[sacral promontory]].{{sfn|OED|1989|loc="promontory"}} |
||
Both ''tubercle'' and ''tuberosity'' refer to a projection or bump with a roughened surface, with a |
Both ''tubercle'' and ''tuberosity'' refer to a projection or bump with a roughened surface, with a "tubercle" generally smaller than a "tuberosity". These terms are derived from ''[[tuber]]'' ({{langx|la|swelling}}).,{{sfn|OED|1989|loc="Tuberous, Tubercle"}} as is also ''[[protuberance (disambiguation)|protuberance]]'', which occasionally is synonymous with "tuberosity". |
||
A ''ramus'' refers to an extension of bone, such as the [[ramus of the mandible]] in the [[Human jaw|jaw]] or [[ |
A ''ramus'' ({{langx|la|branch}}) refers to an extension of bone,{{sfn|OED|1989|loc="ramus"}} such as the [[ramus of the mandible]] in the [[Human jaw|jaw]] or [[superior pubic ramus]]. Ramus may also be used to refer to nerves, such as the [[ramus communicans]]. |
||
A ''facet'' refers to a small, flattened articular surface. |
A ''facet'' refers to a small, flattened articular surface.{{citation needed|date=March 2014}} |
||
===Pointed=== |
===Pointed=== |
||
A ''line'' refers to a long, thin projection, often with a rough surface. |
A ''line'' refers to a long, thin projection, often with a rough surface. |
||
''Ridge'' and ''crest'' refer to a long, narrow line. |
''Ridge'' and ''crest'' refer to a long, narrow line.{{sfn|OED|1989|loc="Crest"}} Unlike many words used to describe anatomical terms, the word ''ridge'' is derived from [[Old English]]. {{sfn|OED|1989|loc="Ridge"}} {{efn|Specifically, 'spine, crest' ([[Old English]]:hrycg) from [[Germanic language|Germanic]] related to the [[Dutch language|Dutch]] "rug" and [[German language|German]] "Rücken" 'back'. {{sfn|OED|1989|loc="Ridge"}} }} |
||
A ''spine'', as well as referring to the [[spinal cord]], may be used to describe a relatively long, thin projection or bump. |
A ''spine'', as well as referring to the [[spinal cord]], may be used to describe a relatively long, thin projection or bump. |
||
Line 45: | Line 52: | ||
These terms are used to describe bony protuberances in specific parts of the body. |
These terms are used to describe bony protuberances in specific parts of the body. |
||
The ''[[:wikt:Malleolus|Malleolus]]'' ({{ |
The ''[[:wikt:Malleolus|Malleolus]]'' ({{langx|la|"small hammer"}}) is the bony prominence on each side of the [[ankle]]. {{sfn|OED|1989|loc="Malleolus"}} These are known as the medial and lateral malleolus. Each leg is supported by two bones, the [[tibia]] on the inner side (medial) of the leg and the [[fibula]] on the outer side (lateral) of the leg. The ''medial malleolus'' is the prominence on the inner side of the ankle, formed by the lower end of the tibia. The ''lateral malleolus'' is the prominence on the outer side of the ankle, formed by the lower end of the fibula. |
||
The ''[[:wikt:trochanter|trochanter]]s'' are parts of the femur, to which muscles attach. |
The ''[[:wikt:trochanter|trochanter]]s'' are parts of the femur, to which muscles attach.{{sfn|OED|1989|loc="Trochanter"}} It may refer to the [[Greater trochanter|greater]], [[Lesser trochanter|lesser]], or [[third trochanter]] |
||
==Cavities== |
==Cavities== |
||
===Openings=== |
===Openings=== |
||
The following terms are used to describe cavities that connect to other areas: |
The following terms are used to describe cavities that connect to other areas: |
||
A ''[[:wikt:foramen|foramen]]'' |
A ''[[:wikt:foramen|foramen]]'' is any opening, particularly referring to those in [[bone]]. {{sfn|OED|1989|loc="Foramen"}} Foramina inside the [[Anatomy|body]] of [[human body|humans]] and other [[Animal#Structure|animals]] typically allow [[muscle]]s, [[nerve]]s, [[artery|arteries]], [[vein]]s, or other structures to connect one part of the body with another. An example is the [[foramen magnum]] in occipital bone. |
||
A ''canal'' is a long, tunnel-like foramen, usually a passage for notable nerves or blood vessels. |
A ''canal'' is a long, tunnel-like foramen, usually a passage for notable nerves or blood vessels. An example is the [[auditory canal]]. |
||
===Blind-ended=== |
===Blind-ended=== |
||
The following terms are used to describe cavities that do not connect to other areas: |
The following terms are used to describe cavities that do not connect to other areas: |
||
A ''[[:wikt:fossa|fossa]]'' ( |
A ''[[:wikt:fossa|fossa]]'' (from the Latin "''fossa''", ditch or trench) is a depression or hollow, usually in a bone, such as the [[hypophyseal fossa]], the depression in the [[sphenoid bone]].<ref>Venieratos D, Anagnostopoulou S, Garidou A., A new morphometric method for the sella turcica and the hypophyseal fossa and its clinical relevance. Folia Morphol (Warsz). 2005 Nov; 64(4): 240–47. {{PMID|16425149}}</ref> |
||
A |
A ''[[:wikt:meatus|meatus]]'' is a short canal that opens to another part of the body.{{sfn|OED|1989|loc="meatus"}} An example is the [[external auditory meatus]]. |
||
>[http://www.merriam-webster.com/dictionary/meatus Entry "meatus" in Merriam-Webster Online Dictionary].</ref> is a short canal that opens to another part of the body. {{sfn|OED|1989|loc="meatus"}} {{efn|(The plural forms of "meatus" are: ''meatus'', as a Latin form (of the [[Latin_declension#d4|fourth declension noun class]], which the word belongs to); or ''meatuses'', as a normally derived English plural; or often, and incorrectly, ''meati'', by false analogy with the very common Latin ''-us/-i'' forms (such as ''alumnus/alumni''), i.e., the [[Latin_declension#d1|second declension noun class]].)}} |
|||
A ''[[:wikt:fovea|fovea]]'' ({{ |
A ''[[:wikt:fovea|fovea]]'' ({{langx|la|pit}}) is a small pit, usually on the head of a bone. An example of a ''fovea'' is the [[fovea capitis]] of the head of the femur. |
||
===Walls=== |
===Walls=== |
||
The following terms are used to describe the walls of a cavity: |
The following terms are used to describe the walls of a cavity: |
||
A ''[[:wikt:labyrinth|labyrinth]]'' refers to the [[bony labyrinth]] and [[membranous labyrinth]], components of the inner ear, due to their fine and complex structure. |
A ''[[:wikt:labyrinth|labyrinth]]'' refers to the [[bony labyrinth]] and [[membranous labyrinth]], components of the inner ear, due to their fine and complex structure.{{sfn|OED|1989|loc="labyrinth"}} |
||
A ''[[:wikt:sinus|sinus]]'' refers to a bony cavity, usually within |
A ''[[:wikt:sinus|sinus]]'' refers to a bony cavity, usually within the [[Human skull|skull]].{{sfn|OED|1989|loc="sinus"}} |
||
==Joints== |
|||
==Relationship with other bones== |
|||
{{main|Joint}} |
|||
===Articulations=== |
|||
A joint, or [[Joint|articulation]] is the region where adjacent bones contact each other, for example the [[elbow]], [[shoulder]], or [[costovertebral joint]]. Terms that refer to joints include: |
|||
{| class="wikitable" border="1" |
|||
* ''articular process'', referring to a projection that contacts an adjacent bone. |
|||
⚫ | |||
⚫ | |||
| ''articulation''|| The region where adjacent bones contact each other — a [[joint]]. |
|||
⚫ | |||
|- |
|||
⚫ | |||
⚫ | |||
|} |
|||
⚫ | |||
⚫ | |||
===Gross features=== |
===Gross features=== |
||
Bones are commonly described with the terms ''head'', ''neck'', ''shaft'', ''body'' and ''base'' |
Bones are commonly described with the terms ''head'', ''neck'', ''shaft'', ''body'' and ''base'' |
||
The ''head'' of a bone usually refers to the |
The ''head'' of a bone usually refers to the distal end of the bone. The shaft refers to the elongated sections of [[long bone]], and the ''neck'' the segment between the head and shaft (or body). The end of the long bone opposite to the head is known as the ''base''. |
||
===Internal regions=== |
===Internal regions=== |
||
[[File:623 Epiphyseal Plate-Line.jpg|thumb|right|The epiphyseal plate is the area in which bone growth occurs after birth through [[endochondral ossification]].]] |
|||
{|class="wikitable" |
{|class="wikitable" |
||
|- |
|- |
||
! Bone feature||Definition |
! Bone feature || Definition || Etymologic [[mnemonic|memory aid]] |
||
|- |
|- |
||
| [[tubercle (bone)|apophysis]] |
|||
⚫ | |||
| Any of various [[process (anatomy)|processes]] or [[tubercle (anatomy)|protuberances]] on a bone. |
|||
| ''[[wikt:apo-#Prefix|apo-]]'' + ''[[epiphyseal plate|physis]]'', "outward from the growth part; outgrowth" |
|||
⚫ | |||
⚫ | |||
| The long, relatively straight main body of a long bone; region of primary ossification. Also known as the ''shaft''. |
| The long, relatively straight main body of a long bone; region of primary ossification. Also known as the ''shaft''. |
||
| ''[[wikt:dia-#Prefix|dia-]]'' + ''[[epiphyseal plate|physis]]'', "between the growth parts" |
|||
|- |
|- |
||
| |
| [[epiphysis]] |
||
| The end regions of a long bone; regions of secondary ossification. |
| The end regions of a long bone; regions of secondary ossification. |
||
| ''[[wikt:epi-#Prefix|epi-]]'' + ''[[epiphyseal plate|physis]]'', "on top of the growth part" |
|||
|- |
|- |
||
| |
| physis ([[epiphyseal plate]]) |
||
| Also known as the ''growth plate |
| Also known as the ''growth plate''. In a long bone it is a thin disc of [[hyaline]] cartilage that is positioned [[Transverse plane|transversely]] between the epiphysis and [[metaphysis]]. In the long bones of humans, the epiphyseal plate disappears by twenty years of age. |
||
| ''[[epiphyseal plate|physis]]'', "the growth part" |
|||
|- |
|- |
||
⚫ | |||
|- |
|||
⚫ | |||
| The region of a long bone lying between the epiphysis and diaphysis. |
| The region of a long bone lying between the epiphysis and diaphysis. |
||
| ''[[wikt:meta-#Prefix|meta-]]'' + ''[[epiphyseal plate|physis]]'', "the transitional part (between shaft and end) leading to the growth part" |
|||
|- |
|- |
||
|} |
|} |
||
===Internal and external=== |
===Internal and external=== |
||
[[File:619 Red and Yellow Bone Marrow.jpg|thumb|left|Inside of |
[[File:619 Red and Yellow Bone Marrow.jpg|thumb|left|Inside of the [[caput femoris|head of femur]], showing surface of the bone, red and yellow bone marrow.]] |
||
The cortex of a bone is used to refer to its outer layers, and medulla used to refer to the inner surface of the bone. |
The cortex of a bone is used to refer to its outer layers, and medulla used to refer to the inner surface of the bone. |
||
[[Red marrow]], in which blood is formed is present in [[spongy bone]] as well as in the [[medullary cavity]], while the fatty [[yellow marrow]] is present primarily in the medullary cavity. {{citation needed|date=March 2014}} |
|||
{{clear}} |
|||
==See also== |
|||
* [[Anatomical terms of muscle]] |
|||
* [[Anatomical terminology]] |
|||
==Notes== |
==Notes== |
||
{{notelist}} |
{{notelist}} |
||
==Additional images== |
|||
<gallery> |
|||
File:606 Spongy Bone.jpg |
|||
File:604 Bone cells.jpg |
|||
File:607 Periosteum and Endosteum.jpg |
|||
File:608 Endochrondal Ossification.jpg |
|||
File:609 Body Supply to the Bone.jpg |
|||
File:621 Anatomy of a Flat Bone.jpg |
|||
File:623 Epiphyseal Plate-Line.jpg |
|||
File:624 Diagram of Compact Bone-new.jpg |
|||
</gallery> |
|||
==References== |
==References== |
||
''This Wikipedia entry incorporates text from the freely |
''This Wikipedia entry incorporates text from the freely licensed Connexions [http://cnx.org] edition of Anatomy & Physiology [http://cnx.org/content/col11496/1.6/] text-book by OpenStax College'' |
||
{{reflist}} |
{{reflist}} |
||
;Books |
;Books |
||
* {{cite book |
* {{cite book |
||
| |
| editor = J. A. Simpson |
||
| title = The Oxford English dictionary. |
| title = The Oxford English dictionary. |
||
| url = https://archive.org/details/oxfordenglishdic12simp |
|||
| url-access = registration |
|||
| year = 1989 |
| year = 1989 |
||
| publisher=Clarendon Press |
| publisher=Clarendon Press |
||
Line 147: | Line 153: | ||
| ref={{harvid|OED|1989}} |
| ref={{harvid|OED|1989}} |
||
}} |
}} |
||
[[Category:Bones]] |
|||
[[Category:Human anatomy]] |
|||
[[Category:Anatomical terminology]] |
Latest revision as of 21:30, 21 December 2024
This article is part of a series on |
Anatomical terminology |
---|
Many anatomical terms descriptive of bone are defined in anatomical terminology, and are often derived from Greek and Latin. Bone in the human body is categorized into long bone, short bone, flat bone, irregular bone and sesamoid bone.
Types of bone
[edit]Long bones
[edit]A long bone is one that is cylindrical in shape, being longer than it is wide. However, the term describes the shape of a bone, not its size, which is relative. Long bones are found in the arms (humerus, ulna, radius) and legs (femur, tibia, fibula), as well as in the fingers (metacarpals, phalanges) and toes (metatarsals, phalanges). Long bones function as levers; they move when muscles contract.[1]
Short bones
[edit]A short bone is one that is cube-like in shape, being approximately equal in length, width, and thickness. The only short bones in the human skeleton are in the carpals of the wrists and the tarsals of the ankles. Short bones provide stability and support as well as some limited motion.[1]
Flat bones
[edit]The term “flat bone” is something of a misnomer because, although a flat bone is typically thin, it is also often curved. Examples include the cranial (skull) bones, the scapulae (shoulder blades), the sternum (breastbone), and the ribs. Flat bones serve as points of attachment for muscles and often protect internal organs. Flat bones do not have a medullary cavity because they are thin.[1]
Irregular bones
[edit]An irregular bone is one that does not have an easily classified shape and defies description. These bones tend to have more complex shapes, like the vertebrae that support the spinal cord and protect it from compressive forces. Many facial bones, particularly the ones containing sinuses, are classified as irregular bones.[1]
Sesamoid bones
[edit]A sesamoid bone is a small, round bone that, as the name suggests, is shaped like a sesame seed. These bones form in tendons (the sheaths of tissue that connect bones to muscles) where a great deal of pressure is generated in a joint. The sesamoid bones protect tendons by helping them overcome compressive forces. Sesamoid bones vary in number and placement from person to person but are typically found in tendons associated with the feet, hands, and knees. The only type of sesamoid bone that is common to everybody is the kneecap (patella, pl. patellae) which is also the largest of the sesamoid bones.[1]
Protrusions
[edit]Rounded
[edit]A condyle is the round prominence at the end of a bone, most often part of a joint – an articulation with another bone.[2] The epicondyle refers to a projection near a condyle, particularly the medial epicondyle of the humerus.[3] These terms derive from Greek.[4] [a]
An eminence refers to a relatively small projection or bump, particularly of bone, such as the medial eminence.[5]
A process refers to a relatively large projection or prominent bump,[6] as does a promontory such as the sacral promontory.[7]
Both tubercle and tuberosity refer to a projection or bump with a roughened surface, with a "tubercle" generally smaller than a "tuberosity". These terms are derived from tuber (Latin: swelling).,[8] as is also protuberance, which occasionally is synonymous with "tuberosity".
A ramus (Latin: branch) refers to an extension of bone,[9] such as the ramus of the mandible in the jaw or superior pubic ramus. Ramus may also be used to refer to nerves, such as the ramus communicans.
A facet refers to a small, flattened articular surface.[citation needed]
Pointed
[edit]A line refers to a long, thin projection, often with a rough surface.
Ridge and crest refer to a long, narrow line.[10] Unlike many words used to describe anatomical terms, the word ridge is derived from Old English. [11] [b]
A spine, as well as referring to the spinal cord, may be used to describe a relatively long, thin projection or bump.
Special
[edit]These terms are used to describe bony protuberances in specific parts of the body.
The Malleolus (Latin: "small hammer") is the bony prominence on each side of the ankle. [12] These are known as the medial and lateral malleolus. Each leg is supported by two bones, the tibia on the inner side (medial) of the leg and the fibula on the outer side (lateral) of the leg. The medial malleolus is the prominence on the inner side of the ankle, formed by the lower end of the tibia. The lateral malleolus is the prominence on the outer side of the ankle, formed by the lower end of the fibula.
The trochanters are parts of the femur, to which muscles attach.[13] It may refer to the greater, lesser, or third trochanter
Cavities
[edit]Openings
[edit]The following terms are used to describe cavities that connect to other areas:
A foramen is any opening, particularly referring to those in bone. [14] Foramina inside the body of humans and other animals typically allow muscles, nerves, arteries, veins, or other structures to connect one part of the body with another. An example is the foramen magnum in occipital bone.
A canal is a long, tunnel-like foramen, usually a passage for notable nerves or blood vessels. An example is the auditory canal.
Blind-ended
[edit]The following terms are used to describe cavities that do not connect to other areas:
A fossa (from the Latin "fossa", ditch or trench) is a depression or hollow, usually in a bone, such as the hypophyseal fossa, the depression in the sphenoid bone.[15]
A meatus is a short canal that opens to another part of the body.[16] An example is the external auditory meatus.
A fovea (Latin: pit) is a small pit, usually on the head of a bone. An example of a fovea is the fovea capitis of the head of the femur.
Walls
[edit]The following terms are used to describe the walls of a cavity:
A labyrinth refers to the bony labyrinth and membranous labyrinth, components of the inner ear, due to their fine and complex structure.[17]
A sinus refers to a bony cavity, usually within the skull.[18]
Joints
[edit]A joint, or articulation is the region where adjacent bones contact each other, for example the elbow, shoulder, or costovertebral joint. Terms that refer to joints include:
- articular process, referring to a projection that contacts an adjacent bone.
- suture, referring to an articulation between cranial bones.
Features of long bones
[edit]Gross features
[edit]Bones are commonly described with the terms head, neck, shaft, body and base
The head of a bone usually refers to the distal end of the bone. The shaft refers to the elongated sections of long bone, and the neck the segment between the head and shaft (or body). The end of the long bone opposite to the head is known as the base.
Internal regions
[edit]Bone feature | Definition | Etymologic memory aid |
---|---|---|
apophysis | Any of various processes or protuberances on a bone. | apo- + physis, "outward from the growth part; outgrowth" |
diaphysis | The long, relatively straight main body of a long bone; region of primary ossification. Also known as the shaft. | dia- + physis, "between the growth parts" |
epiphysis | The end regions of a long bone; regions of secondary ossification. | epi- + physis, "on top of the growth part" |
physis (epiphyseal plate) | Also known as the growth plate. In a long bone it is a thin disc of hyaline cartilage that is positioned transversely between the epiphysis and metaphysis. In the long bones of humans, the epiphyseal plate disappears by twenty years of age. | physis, "the growth part" |
metaphysis | The region of a long bone lying between the epiphysis and diaphysis. | meta- + physis, "the transitional part (between shaft and end) leading to the growth part" |
Internal and external
[edit]The cortex of a bone is used to refer to its outer layers, and medulla used to refer to the inner surface of the bone. Red marrow, in which blood is formed is present in spongy bone as well as in the medullary cavity, while the fatty yellow marrow is present primarily in the medullary cavity. [citation needed]
See also
[edit]Notes
[edit]References
[edit]This Wikipedia entry incorporates text from the freely licensed Connexions [1] edition of Anatomy & Physiology [2] text-book by OpenStax College
- ^ a b c d e "Anatomy & Physiology". Openstax college at Connexions. 25 April 2013. Retrieved November 16, 2013.
- ^ OED 1989, "Condyle".
- ^ OED 1989, "Epicondyle".
- ^ a b OED 1989, "Condyle, Epicondyle, Epi-".
- ^ OED 1989, "eminence".
- ^ OED 1989, "process".
- ^ OED 1989, "promontory".
- ^ OED 1989, "Tuberous, Tubercle".
- ^ OED 1989, "ramus".
- ^ OED 1989, "Crest".
- ^ a b OED 1989, "Ridge".
- ^ OED 1989, "Malleolus".
- ^ OED 1989, "Trochanter".
- ^ OED 1989, "Foramen".
- ^ Venieratos D, Anagnostopoulou S, Garidou A., A new morphometric method for the sella turcica and the hypophyseal fossa and its clinical relevance. Folia Morphol (Warsz). 2005 Nov; 64(4): 240–47. PMID 16425149
- ^ OED 1989, "meatus".
- ^ OED 1989, "labyrinth".
- ^ OED 1989, "sinus".
- Books
- J. A. Simpson, ed. (1989). The Oxford English dictionary. Oxford: Clarendon Press. ISBN 9780198611868.