Histology and Embryology quizzes
How the embryo forms three germ layers, and how these give rise to the body's tissues and organs.
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From Histology and Embryology: The Week You Became Three Layers
Roughly how often is the inner lining of the small intestine completely replaced?
- Every few months
- Every few days
- Every several years
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Answer: Every few days
Stem cells in the crypts constantly produce new cells that migrate up the villi and are shed at the tips within about three to five days, one of the fastest renewals in the body.
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