If an incision had to be made in the small intestine to remove an obstruction, the first layer of tissue to be cut would be the ________
A) muscularis externa
B) mucosa
C) serosa
D) submucosa
C
Explanation:
A) The muscularis externa is not the first layer of the small intestine.
B) The mucosa is not the first layer of the small intestine.
D) The submucosa is not the first layer of the small intestine.
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