dartos muscle:

Or: dartos / tunica-dartos , the layer of contractible muscle fibers under the skin of the scrotum ; they are involuntary muscle fibres that react to temperature and sexual stimulation.
See Also: abdominal wall, anal sphincter, bottle dance, colpismus, corpuscle, cremaster, cremaster muscle, danse du ventre, dartos, dartos muscle, gluteus, musckles, PC muscle, pubococcygeal muscle, pubococcygeous muscle, pubococcygeus, rubber flexes, tunica dartos

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