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Primitive gut

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The Fiber Disease

... the most common and familiar forms) Description Sponges are the most primitive of the multicellular invertebrates. They lack a mouth and gut. The bodies are organized around a system of water canals. Sponges feed, breath, reproduce, ...

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by Skytroll
Sat Jul 22, 2006 6:16 pm
Forum: Human Biology
Topic: The Fiber Disease
Replies: 7403
Views: 4988528

germ layers

... and mesoderm --> ectoderm = skin for example --> endoderm = primitive gut (the lungs are formed out of this structure) --> mesoderm is divided into four pieces: ...

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by sdekivit
Sat Nov 19, 2005 4:47 pm
Forum: General Discussion
Topic: germ layers
Replies: 2
Views: 1960

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