The organs that enable a man to have sexual intercourse and to fertilize ova with sperm.Sperm and male sex homorns are produced in the testes.The testes are the pair of male reproductive glands located in the scrotum, a skin-covered sac that hangs from the groin. Each testis produces sperm cells, while the testes as a whole secrete testosterone.Testosterone is a hormone—a type of molecule that sends signals to spots remote from its point of origin to induce specific effects on the activities of other cells. From each testis sperm pass into an epydidymics a long coiled tube behind the testis,where they slowly mature and are stored.Shortly before ejaculation, sperm are propelled from the epididymis into a long duct called the vas deferens,which carries the sperm to the seminal vesicles,a pair of sacs that lie behind the bladder.These sacs produce seminal fluid,which is added to the sperms to produce semen.
Liquid secretions from various glands combine with sperm (itself a gooey substance that is barely liquid) to form the semen, or seminal fluid. Ejaculated semen may contain as many as 400 million sperm
Semen travels from the vesicles along two ducts to the urethra,a tube that acts as a passage far urine and for semen.The ducts pass through the prostrate glands,a chestnut-shaped organ which lies beneath the bladder and surround the upper urethra.the prostate produces secretions that are added to the semen.
At orgasm, semen is ejaculated from the urethra through the erect penis,which during sexual intercourse is places in the woman’s vagina.
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