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Copyright © 2008 Pearson Education, Inc., publishing as Benjamin Cummings

Week 4 – The Body Takes Shape

Folding of embryo laterally and at the head and tail

Embryonic disc bulges; growing faster than yolk sac

“Tadpole shape” by day 24 after conception

Primitive gut – encloses tubular part of the yolk sac

Site of future digestive tube and respiratory structures

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