Endoderm & Primitive Gut

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5 Terms

1
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What process incorporates part of yolk sac into embryo to form primitive gut?

Embryo folding (cephalocaudal + lateral).

2
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Which part of primitive gut communicates with yolk sac?

Midgut (via vitelline duct).

3
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How is primitive gut initially closed at both ends?

Oropharyngeal membrane (cranial) & cloacal membrane (caudal).

4
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Which organs derive from cloaca?

Rectum, urinary bladder, urethra (posterior part = rectum, anterior = bladder, urethra, vagina lower part).

5
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List key derivatives of endoderm.

GI lining (except oral cavity + lower anal canal), liver, pancreas, respiratory lining, bladder, urethra, lower vagina, thyroid, parathyroids.