However, this may not be the main function of the scrotum. The volume of sperm produced by the testes is small (0.1-0.2 ml).[clarification needed] It has been suggested that if testes were situated within the abdominal colliery that they would be subjected to the regular changes in abdominal pressure that argon exerted by the abdominal muscles. This squeezing and relaxing would result in the more rapid emptying of the testes and epididymis of sperm before the spermatozoa were full-blown sufficiently for fertilization.
Some mammals â" elephants and marine mammals, for example â" do keep their testes within the abdomen and there may be mechanisms to close out this inadvertent emptying.
Contraction of the abdominal muscles, and changes in intra-abdominal pressure, can oft lift and lower the testicles within the scrotum. Contraction of the muscle fibers of the dartos adventitia (or fascia) is completely involuntary and results in the appearance of increased wrinkling and leaf node of the scrotal skin. The testicles are not directly attached to the skin of the scrotum, so this dartos contraction results in their sliding toward the abdomen. They also, in few men, can be lifted the same way by tightening the anus and...If you want to get a full essay, set it on our website: Orderessay
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