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The internal sex organs of the girl
The internal sexual organs of the girl are the vagina, the uterus (womb), fallopian tubes and ovaries.
The vagina is about 4 inches long. Its walls normally lie close together, but can expand to let a penis in or a baby out.
At the back of the vagina one can feel the mouth of the uterus, called cervix, as a small round lump.
The uterus, or womb, has the shape of a pear and is about the same size.
On either side of the upper part of the uterus, the fallopian tubes, or oviducts, spread out over the ovaries.
The ovaries are round and from birth contain thousands of egg cells. At puberty an egg cell (ovum) pops out of the ovary once a month and is caught by the fallopian tube, which transports the ovum to the uterus.
The external sex organs of the girl
The external sex organs of the girl are the clitoris, the inner lips, the outer lips and the mons pubis.
The clitoris, or clit, is the pleasure centre. It is situated above the peehole. When aroused, it grows in size andbecomes very sensitive. It has a little foreskin.
The inner lips enclose the opening of the vagina, also called ‘vulva’. They are covered by mucous membrane, are pink in colour, and may stick out visibly. Inside the opening of the vagina there is a thin ring of tissue, which is called ‘hymen’ (after the Greek goddess of marriage Hymen) or ‘virgin’s membrane’. At the first penetration this may rupture and bleed a little.
The outer lips are fatter and covered by normal skin on which hair starts growing at puberty.
The outer lips converge at the top to form a cushion of fatty tissue on the pubic bone, called the mons pubis or mount of Venus (the Greek goddess of love). The mons pubis is the visible genital when the girl is standing.
The internal sex organs of the boy
The internal sex organs of the boy are the testicles and epididymis, from each of which runs a tube called vas deferens up to the prostate gland and from there into the urethra (urinary tube)
The testicles are also called balls, nuts, family jewels, bollocks, etc. At the beginning of puberty the begin to produce young sperm cells. One of the balls usually hangs a little lower than the other.
The epididymis is a rolled-up string of tissue which lies next to the testicles). The young sperm cells from the testicle are stored here and grow until they are ready to leave the body when it is sexually stimulated.
The vas deferens transports the sperm cells and mixes them with fluid from the prostate gland and other small glands.
At orgasm, the fluid, called sperm or semen, is ejaculated out through the urethra, the same tube that carries urine from the bladder.
The external sex organs of the boy
The external sex organs of the boy are the penis and the scrotum
The penis is also called willy, dick, cock, prick, etc, It consists of a shaft and a head or glans. The penis consists of spongy tissue. During sexual arousal blood flows into it and is prevented from flowing out, thus making the penis hard. This is called ‘having an erection’.
The head of the penis is -at birth- covered by a foreskin, which is part of the loose slightly darker skin covering the whole penis. Before puberty the foreskin must become movable over the head, so that the latter can be kept clean. In moslim and jewish cultures, boys are subjected to circumcision, right after birth or at age eight or nine. Their glans is always exposed, and this is said to be make it more resistent to infection.
The scrotum, or sack, is made of flexible leathery skin. To regulate the temperature of the testicles, the scrotum contracts when cold and sags when warm. However, it contracts also when the boy is sexually aroused or nervous.
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