Term
|
Definition
| Asteroidea, Echiniodea(sea urchins), Ophiuroidea(brittle stars), Holothuroidea (sea cucumbers), Crinoidea(feather stars, sea lilies) |
|
|
Term
|
Definition
| spines, ossicles, fusion of ossicles = tests(sea urchins), pedicellaria, madreporite, ambulacral groove and ridge, WVS |
|
|
Term
|
Definition
| jaw-like spines used for anti-fouling (like avicularia) |
|
|
Term
|
Definition
| opening to WVS, maintain hydrostatic pressure |
|
|
Term
| Echinodermata embryonic development |
|
Definition
| deuterostomes, blastopore becomes mouth, indeterminate cell fate, equal and radial cleavage, enterocoelous, diplemula larvae |
|
|
Term
|
Definition
| bilateral larvae, but radial (pentamorous) as adults |
|
|
Term
|
Definition
| nerve ring and radial nerves in ambulacral ridge. some ocelli on tips of arms |
|
|
Term
|
Definition
| mostly extracellular, suspension feeding, differs from class to class. complete except in Ophiuroidea |
|
|
Term
|
Definition
| WVS across walls of papulae and tube feet. no osmoregulation though |
|
|
Term
|
Definition
| also known as dermal branchiae, used for excretory and circulation and respiration. |
|
|
Term
| Echinodermata reproduction |
|
Definition
| external fertilization by broadcast spawning or brooding. amazing regeneration abilities |
|
|
Term
|
Definition
| 2 part stomach: cardiac(close to mouth and eversible) and pyloric(closer to anus); digestive gland secretes digestive enzymes; ocelli at tips of arms, chemosensory tube feet. pair of gonads in each arm, madreporite, stone canal, ring canal, radial canal, lateral canal, tube feet (ampulla and podium) |
|
|
Term
|
Definition
| sea urchins and sand dollars. poisionous pedicellaria, ossicles fused into test, Aristotle's lantern (complex set of 5 jaws) |
|
|
Term
|
Definition
| no anus, no digestive glands or abulacral groove because no tube feet. move with arms, photosensative lenses |
|
|
Term
|
Definition
| sea cucumbers, no arms, can eviscerate, |
|
|
Term
|
Definition
| sea feathers, sea lilies, cilia for feedign, mouth faces upward, cirri grapple like hooks for attachment, no madreporite, no spines, no pedicellaria |
|
|
