Which statement concerning the anal canal is true? The anal canal:
a. Is approximately 2 cm long in the adult.
b. Slants backward toward the sacrum.
c. Contains hair and sebaceous glands.
d. Is the outlet for the gastrointestinal tract.
ANS: D
The anal canal is the outlet for the gastrointestinal tract and is approximately 3.8 cm long in the adult. It is lined with a modified skin that does not contain hair or sebaceous glands, and it slants forward toward the umbilicus.
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