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The penis serves both excretory and reproductive functions in the human male

sexual activity, also referred to as coitus, or copulation, reproductive work where the male reproductive organ (in humans and other higher pets) gets in the feminine reproductive tract. In the event that reproductive work is complete, sperm cells are passed away through the male human body in to the feminine, along the way fertilizing the feminine egg and developing an organism that is new. In a few vertebrates, such as for example seafood, eggs are set outside the human anatomy and fertilized externally.

To complete copulation that is internal human anatomy and natural adaptations are essential.

During sexual intercourse, the blood circulation is temporarily increased and caught in your penis such that it becomes enlarged and elevated, an ailment referred to as erection. Erection modifications the ordinarily soft and flacc > semen cells, which might unite with and fertilize the feminine egg, and a seminal plasma which contains mobile nutritional elements, water, salts, and metabolites—into the female’s genital canal. 続きを読む »

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