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Primitive gut

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Humans are Deuterostomes. Right?..

... humans), the original dent (blastopore) becomes the anus, while the gut eventually tunnels through the embryo until it reaches the other side, ... out, there is no archenteron in human embryo at all. In fact, there are primitive node/streak/groove. Besides, that primitive groove is somehow connected ...

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by Siroggak
Tue Aug 12, 2014 4:46 pm
Forum: Human Biology
Topic: Humans are Deuterostomes. Right?..
Replies: 0
Views: 184

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: 5478535

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: 2086

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