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A flame cell is a specialized excretory cell found in simple invertebrates, including flatworms (Platyhelminthes), rotifers and nemerteans; these are the simplest animals to have a dedicated excretory system. Flame cells function like a kidney, removing waste materials. Bundles of flame cells are called protonephridia.^[1]

The flame cell has a nucleated cell body, with a "cup-shaped" projection, with flagella covering the inner surface of the cup. The beating of these flagella resemble a flame, giving the cell its name. The cup is attached to a tube cell, whose inner surface is also coated in cilia, which help to move liquid through the tube cell. The tube opens externally through a nephropore, or, in the trematoda, into an excretory bladder. The function of these cells is to regulate the osmotic pressure of the worm, and maintain its ionic balance. Microvilli in the tube cell may be used to reabsorb some ions.^[1]

Molecules enter the tubule in tube cells through the gap between the flame cell and tube cell for excretion.^[2]

References

^ ^a ^b Ruppert, E.E.; Fox, R.S & Barnes, R.D. (2004). Invertebrate Zoology (7th ed.). Brooks/Cole. pp. 213–215. ISBN 0-03-025982-7.
^ Pechenik, Jan A. (2009). Biology of the Invertebrates. McGraw-Hill Higher Education. pp. 150–151. ISBN 9780073028262.

External links

Animation of Excretion

[RuppertBarnes2004Bilateria-1] Ruppert, E.E.; Fox, R.S & Barnes, R.D. (2004). Invertebrate Zoology (7th ed.). Brooks/Cole. pp. 213–215. ISBN 0-03-025982-7.

[2] Pechenik, Jan A. (2009). Biology of the Invertebrates. McGraw-Hill Higher Education. pp. 150–151. ISBN 9780073028262.

[1]

[2]

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+{{Short description|Perform excretion and maintain osmotic pressure in Platyhelminthes}}
-[[image:Flamecell.jpg|right|frame]]A '''flame cell''' is a specialized excretory cell found in the [[Platyhelminthes]] (except the tubellarian [[order (biology)|order]] ''Acoela''), these are the simplest animals to have a dedicated excretory system. It functions like a kidney removing waste materials.
+[[File:Flamecell.jpg|right|frame]]
+A '''flame cell''' is a specialized excretory cell found in simple [[invertebrate]]s, including  [[flatworm]]s ([[Platyhelminthes]]), [[rotifers]] and [[nemertea]]ns; these are the simplest animals to have a dedicated [[excretory system]]. Flame cells function like a [[kidney]], removing waste materials. Bundles of flame cells are called [[protonephridia]].<ref name="RuppertBarnes2004Bilateria">{{cite book|author=Ruppert, E.E.|author2=Fox, R.S |author3=Barnes, R.D.|name-list-style=amp| title=Invertebrate Zoology| publisher=Brooks/Cole|edition=7th|isbn=0-03-025982-7|year=2004|pages=[https://archive.org/details/isbn_9780030259821/page/213 213–215]|url-access=registration| url=https://archive.org/details/isbn_9780030259821/page/213}}</ref>
-The flame cell has a [[nucleus (biology)|nucleated]] cell body, with a "cup-shaped" projection, with [[cilia]] covering the inner surface of the cup. The beating of these cilia resemble a flame, giving the cell its name. The cup is attached to a '''tube cell'''. The inner surface of the tube cell is coated in [[flagella]]. The beating of the cillia and flagella help move liquid through the tube cell. The tube opens externally through a ''nephropore'', or, in the [[trematoda]], into an excretory [[bladder]]. The function of these cells is to regulate the [[osmotic pressure]] of the worm, and maintain its ionic balance. [[Microvilli]] in the tube cell may be used to resorb some [[ion]]s.
+The flame cell has a [[nucleus (biology)|nucleated]] cell body, with a "cup-shaped" projection, with [[flagella]] covering the inner surface of the cup. The beating of these flagella resemble a flame, giving the cell its name. The cup is attached to a '''tube cell''', whose inner surface is also coated in [[cilia]], which help to move liquid through the tube cell. The tube opens externally through a ''nephropore'', or, in the [[trematoda]], into an excretory [[Urinary bladder|bladder]]. The function of these cells is to regulate the [[osmotic pressure]] of the worm, and maintain its ionic balance. [[Microvilli]] in the tube cell may be used to reabsorb some [[ion]]s.<ref name="RuppertBarnes2004Bilateria" />
+Molecules enter the tubule in tube cells through the gap between the flame cell and tube cell for excretion.<ref>{{Cite book|title=Biology of the Invertebrates|last=Pechenik|first=Jan A.|publisher=McGraw-Hill Higher Education|year=2009|isbn=9780073028262|pages=150–151}}</ref>
-[[Category:Animal anatomy]]
+==See also==
+*[[Nephron]], the similar structure in vertebrates
+*[[Nephridia]], the excretory organ in [[annelids]]
+*[[Malphigian tubule system]], the excretory organ in [[arthropods]]
+*[[Solenocyte]]
+==References==
+{{reflist}}
+==External links==
+* [http://www.biology.ualberta.ca/courses.hp/zool250/animations/Excretion.swf Animation of Excretion]
+[[Category:Animal cells]]
+[[Category:Secretory cells]]
 [[Category:Urinary system]]