The Reproductive Parts of the Male body

The man plays a brief but virtually important role in reproduction. He produces the sperm which fertilizes the egg to begin a new life. After fertilization, the man’s biological role in pregnancy is over, although his responsibility toward the woman and child continue. A man’s major reproductive organ lies outside his body. They are:

The Testes (Testicles): The two testes produce the sperm which fertilizes the woman’s egg to start the process of reproduction. They are two egg-shaped organs, in front of and between the thighs, within a sac of skin known as the scrotum. From puberty until old age, men’s testes produce sperm all the time. While a woman releases one egg every month, a man releases 100 – 300 million sperm every time he ejaculates, or reaches climax, during sexual intercourse. During ejaculation, the sperm are carried in liquid called semen that is produced by the man’s reproductive organs. The semen passes through a tube called the vas deferens and out of the penis. One of the millions of sperm may reach an egg and fertilize it; the rest simply die in a few days and disappear.

The Penis: The penis is the organ that carries the semen into the vagina. During sexual excitement, the blood is pumped into the muscles of the penis. This makes the penis stiffen or become erect so it can enter the vagina. Although both semen and urine pass through the tube called the urethra in the penis, at the time of ejaculation the opening from the bladder is closed so that only semen comes out of the penis. After ejaculation, the blood quickly drains away into the body and the penis returns to its normal state.