Perineum
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The perineum in placental mammals is the space between the anus and the genitals. The human perineum is between the anus and scrotum in the male or between the anus and vulva in the female. The perine
The human male perineum (left) and human female perineum (right)
The muscles of the male (left) and female (right) perineum
Scrotum
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In most terrestrial mammals, the scrotum or scrotal sac is a part of the external male genitalia located at the base of the penis. It consists of a sac of skin containing the external spermatic fascia
Perineum
…perineum (pl.: perineums or perinea) in placental mammals is the space between the anus and the genitals. The human perineum is between the anus and scrotum in the male or between the anus and vulva in the female. The perineum is the region of the body between the pubic symphysis (pubic arch) and the coccyx…
A human's scrotum in a relaxed state (left) and a tense state (right)
Image showing musculature and inner workings of the scrotum
Scrotum of a bull
Scrotum of a kangaroo