AHHHHH

yes

are sea star spines movable

yes

how are nutrients distributed to sea stars

ring canals

sea star excretory system

anus on aboral surface

why are ossicles endoskeleton

they are hard, provide support, and inside mouth

how do sea cucumbers eat

tentacles to catch particles

how do sea cucumbers defend themselves

offer their organs to preditors

characteristics that group sea cucumbers and echinoderms in same phylum

ring canal, tube feet, ampullae

do sea stars use tube feet for locomotion

yes

why are echinoderms and chordates considered similar evolution

both deuterostomes, some echinoderms have some of the 5 chordate characteristics

function of water vascular system

gas exchange

what is unique about sea cucumber madreporite

doesn’t reach to exterior, pumps between water vascular system and coelom

what coelom is echidermata

eucoelom and triploblasts

five chordate characteristics

dorsal nerve cord, pharyngeal slits, postanal tail, notochord, thyroid gland

functions of pharynx in tunicates

gas exchange, trapping food

what chordate characteristics do tunicates have / why are they chordates

dorsal nerve chord, notochord, pharyngeal slits

which structures in lancelet exhibit segmentation

muscles

two aspects of lancelet circulatory system that are evolved in mammals