Flame cell: Difference between revisions
m v2.03b - Bot T20 CW#61 - WP:WCW project (Reference before punctuation) |
|||
| Line 15: | Line 15: | ||
}}</ref> |
}}</ref> |
||
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" /> |
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|location=|pages=150-151}}</ref> |
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|location=|pages=150-151}}</ref> |
||
Revision as of 11:59, 5 November 2020
A flame cell is a specialized excretory cell found in the simplest freshwater invertebrates, including flatworms, 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]
See also
- Nephron, the similar structure in vertebrates
- Nephridia, the excretory organ in annelids
- Malphigian tubule system, the excretory organ in arthropods
- Solenocyte
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.