PHYSIOLOGY
GASTROINTESTINAL PHYSIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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From which embryonic layer does the primitive intestine derive?
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ectoderm
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mesoderm
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neural crests
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endoderm
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Explanation:
Detailed explanation-1: -Mesoderm gives rise to the connective tissue, including the wall of the gut tube and the smooth muscle. Endoderm is the source of the epithelial lining of the gastrointestinal tract, liver, gallbladder, pancreas.
Detailed explanation-2: -The endoderm constructs the digestive tube and the respiratory tube. 15. Four pairs of pharyngeal pouches become the endodermal lining of the eustacian tube, tonsils, thymus, and parathyroid glands. The thyroid also forms in this region of endoderm.
Detailed explanation-3: -The primitive gut tube is divided into three sections. The epithelium of and the parenchyma of glands associated with the digestive tract (e.g., liver and pancreas) are derived from endoderm.
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