Deuterostomes

Echinodermata

starfish, sand dollars, sea urchins, & sea cucumbers; deuterostome coelomates

Deuterostome

blastopore becomes anus

Water vascular system

unique to echinodermata; assists in circulation, digestion, movement, & respiration

Madreporite

off-center spot located on aboral side that opens & starts the water vascular system on starfish

How do starfish eat?

carnivores; their stomachs come out of their bodies & surround their prey then draws it back into the body

Larva symmetry in echinodermata

bilateral

Adult symmetry in echinodermata

pentaradial

Endoskeleton in starfish

calcium carbonate

Digestive tract in echinodermata

complete; coelom

Sea urchins are

herbivores/scavengers

Sand dollars are

herbivores

Sea cucumbers

radial symmetry in adulthood; no arms or spines; tube feet

Oral side of starfish

mouth & retracted/extended tube feet