The pectinate line of the anal canal:
A) denotes the separation of the external and internal sphincter ani muscles.
B) denotes the separation between the rectal and anal mucosa.
C) separates the part of the anal canal that is sensitive to laceration from the part that is not.
D) separates the part of the anal canal that is innervated by sympathetic fibers from that innervated by parasympathetic fibers.
E) indicates the anorectal junction.
Ans: C
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