Smooth muscle fibers within the nipple are responsible for nipple erection. These fibers are oriented in which arrangement?

Smooth muscle fibers within the nipple are

Multiple choice — select the best answer

ALongitudinal only
BOblique only
CBoth circular and longitudinal
DRadial only

✓ Correct answer: C. Both circular and longitudinal The nipple contains smooth muscle fibers arranged in both circular (sphincter-like) and longitudinal orientations, enabling erection in response to tactile, thermal, and hormonal stimuli and facilitating milk ejection during lactation.

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Smooth muscle fibers within the nipple are responsible for nipple erection. These fibers are oriented in which arrangement?

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