phylum echinodermata Flashcards
1
Q
what is their distinctive feature
A
they have water vascular system
2
Q
how is the water vascular system useful
A
locomotion, capture, food and water transport, respiration
3
Q
basic characteristics
A
organ system level organisation, radial symmtery, coelomate, triploblastic
4
Q
their excretion & digestion
A
system for excretion absent, digestive system is complete, mouth lower ventral anus upper dorsal
5
Q
theirs sexes , reproduction, fertillisation and development
A
they have seperate sexes, sexual, external usually, indirect and free larva
6
Q
why is their name echinodermata
A
cause they have spiny body interal endoskeleton is calcareous ossicles
7
Q
what would their examples be
A
asterias, ophiura, echinus, cucumaria,antedon
