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Think of it this way. In sea star development, the last stage is the late gastrula, as development continues, two pouches (the coelomis sacs) form by outpocketing from the endoderm surrounding the gut. These pouches become part of the coelom (body cavity), and the walls of the lateral pouches become the third germ layer, the mesoderm.
I got this information from my college lab manual, Inquiry Into Life, Thirteenth Edition
What else can I help you with?
Are Platyhelminthes acoelomates, pseudocoelomates or coelomates?
Coelomates.
Which would you expect to be more complex animals- coelomates or acoelomates?
coelomates
Are there other coelomates besides earthworms?
Most animals are coelomates, including humans.
What phylum contains sea stars?
Includes: Sea Stars, Sea Lillies, Sea Urchins, Sea Cucumbers, Brittle Stars
What are facts about sea stars?
sea stars have NO brains
Are sea stars the same as sea fish?
Sea stars are not fish so no, it is not.
Are sea stars flexible?
sea stars are flexible. sea stars do not have any bones. so they are very flexible:)
What are the groups of echinoderms?
Sea stars, brittle stars, sea urchins, and sea cucumbers.
Are earthworms coelomates?
Yes, earthworms are coelomates because they have the "tube within a tube" body plan that characterises coelomates. More specifically, coelomates have a body cavity that is completely lined with cells derrived from the mesoderm (the germ layer of tissue found between the endoderm and ectoderm in embryonic development).
Do arthropod have pseudocoelom?
No, arthropods are coelomates
Do sea stars need food to survive?
Yes. Sea stars are carnivores that eat can eat other sea stars and shrimp and other crustations like crabs. Over a long period of time sea stars move across the ocean floor. Giant sea stars will sometimes specifically prey on other, smaller sea stars. they eat poop
What are sea stars prey?
sea stars prey are clams,oysters and mollusks
