Defining characteristics
- heterotrophic
- multicellular
- exclusively marine
- pentaradial symmetry
- 3 body wall layers
- true coelom
- 2 stomachs
- water vascular system
- endoskeleton made of ossicles
- 4 classes: Asteroidea, Echinoidea, Holothuroidea, Crinoidea
- sexual reproduction with good powers of regeneration
- tube feet, spines, cardiac stomach, pyloric stomach, pyloric cecum, gonads (dioecious) ambulacral plates and groove, ampulla, madreporite, central disc, stone canal, ring canal, radial canal, mouth, anus etc.
- deuterostomes
- food tubes with a mouth and anus
- heterotrophic
- multicellular
- exclusively marine
- pentaradial symmetry
- 3 body wall layers
- true coelom
- 2 stomachs
- water vascular system
- endoskeleton made of ossicles
- 4 classes: Asteroidea, Echinoidea, Holothuroidea, Crinoidea
- sexual reproduction with good powers of regeneration
- tube feet, spines, cardiac stomach, pyloric stomach, pyloric cecum, gonads (dioecious) ambulacral plates and groove, ampulla, madreporite, central disc, stone canal, ring canal, radial canal, mouth, anus etc.
- deuterostomes
- food tubes with a mouth and anus
he was very much dead ^
Sea star dissection