not sure if this is the place but i need to know how echinoderms respire and about thier circulatory system. links are appreciated.
respiration and circulation in echinoderms
- Thread starter lizardfishman
- Start date
Respiration and gas exchange
Asteroids and crinoids use special thin areas of epidermis for gas exchange, called dermal gills or papulae. Urchins use multiple invaginations of the body wall (bursae) opening to outside via slits, and ventillated with cilia or muscular action. Sand dollars use highly modified podia on aboral surface (petaloids) which are thin-walled and flaplike. Holothurians use a highly branched hindgut called the "respiratory tree" for exchange, with water drawn into and expelled from the anus.
Circulation
Mostly in perivisceral coelom, augmented by the water vascular system and a hemal system. Hemal system is a series of canals and spaces mostly inside c oelomic channels. Fluid movement is by cilia or in some cases by peristaltic pumps. Role seems mostly to distribute nutrients. No respiratory pigment present.
Got that from this website: http://faculty.vassar.edu/mehaffey/academic/animalstructure/outlines/echinodermata.html
I'd just google echinodermata respiration (or something to that effect) to find any more information.
Asteroids and crinoids use special thin areas of epidermis for gas exchange, called dermal gills or papulae. Urchins use multiple invaginations of the body wall (bursae) opening to outside via slits, and ventillated with cilia or muscular action. Sand dollars use highly modified podia on aboral surface (petaloids) which are thin-walled and flaplike. Holothurians use a highly branched hindgut called the "respiratory tree" for exchange, with water drawn into and expelled from the anus.
Circulation
Mostly in perivisceral coelom, augmented by the water vascular system and a hemal system. Hemal system is a series of canals and spaces mostly inside c oelomic channels. Fluid movement is by cilia or in some cases by peristaltic pumps. Role seems mostly to distribute nutrients. No respiratory pigment present.
Got that from this website: http://faculty.vassar.edu/mehaffey/academic/animalstructure/outlines/echinodermata.html
I'd just google echinodermata respiration (or something to that effect) to find any more information.