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What are the male sex organs?

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The male sex organs are the testes and the penis. The two testes are contained in a skin sac called the scrotum, hanging beneath the groin. A tube called the urethra, which is connected to both the bladder and the testes, runs through the middle of the penis.
The urethra is used to pass urine and also, at a different time, to pass sperm out of the man's body. During intercourse the penis becomes stiff as blood is pumped into a cavity called the corpus cavernosum.

Sperm produced in the testes pass along the vas deferens and are stored before leaving the body during intercourse. Liquid from the prostate gland is added to the sperm to make semen, which is ejected along the urethra running through the penis.

How are sperm made?

Sperm, the male sex cells, develop in the testes. They are stored for several days until needed. The testes contain long tubes called the seminiferous tubules, which are tightly coiled. Sperm is produced continuously in these tubes, then passed to the epididymis and stored in a large duct called the vas deferens.

Here liquid is added to the sperm to make a milky fluid called semen. It is stored in pouches called seminal vesicles. During sexual intercourse the seminal vesicles contract and force out the sperm. It passes out of the penis and into the female sexual organs.

How many sperm are there?

Up to 100 million sperm are produced every day by the male. If they are not released, they are soon destroyed and replaced. Sperm look like tiny tadpoles, with rounded heads and long lashing tails.

They use their tails to swim at a speed of about one cm per minute. The head of the sperm contains the nucleus, which will join with the egg cell during fertilization.

Tags: sex, men, body, organs

Category: Education  - ( Education Archive)

Date Added: 23 December '11

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