How THE SEXES Differ ?

How eggs are formed?

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A woman’s ovaries contain follicles, each holding a single egg. Every month, one follicle matures eventually releases its egg. Before ovulation, the nucleus of the egg splits into two: one part, the polar body, moves to the edge of the cell.

How sperms are formed?

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Millions of sperms are formed in the coiled tubules inside a man’s testicles each day. The head of each sperm releases an enzyme which breaks down the barrier around the female egg. Tadpole-like movement of the tail causes the sperm to swim along.

Masculine and Feminine

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Masculine Characteristics
At puberty a boy’s sex glands begin to produce the hormone testosterone which us responsible for secondary sexual characteristics, such as the growth of the penis and the development of hair on the face and body.

Feminine Characteristics
In a girl, secondary sexual characteristics emerge during adolescence when the hormone oestrogen is produced by the ovaries. A girl’s figure takes on a rounder, more feminine shape, and her hips become broader.

Physical Woman

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Height – generally less than that of a man – about 12cm less on average
Voice – higher in pitch than a man’s
Body – soft and rounded – due to the lack of male sex hormones, not merely the presence of female ones
Body hair – scanty, except under the arms and in the pubic area and the skin is soft
Breasts – develop under the influence of the hormone oestrogen
Pubic hair – grows in the shape of a triangle pointing downwards
Hips – are broad compared to a man’s, because a woman’s pelvic cavity is wider

Physical Man

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Hair on the head – can begin to thin during the twenties – first at the side of the forehead and then to the crown
Facial Hair – on the upper lip and lower jaw, first grows during adolescence
Larynx – or voice box, enlarges during adolescence giving a man a deeper voice than a woman
Adam’s apple – is prominent in men but not in women
Shoulders and chest are broader, and a man’s body is more angular than a woman’s
Coarse hair – grows in the armpits and often on the chest
Pubic hair – grows in the shape of a tri-angle pointing up towards the navel

A Woman

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A woman’s sex glands are the ovaries, which are set within the lower abdomen. The passage leading to the ovaries is made up of the vagina, womb (uterus), and Fallopian tubes. The external female genitals, or vulva, include the lip-shaped folds called the labia majora and labia minora. An egg, or ovum, forms in one of the ovaries, and travels along a Fallopian tube. The egg enters the womb and, if it has been fertilised, sinks into the wall of the womb, where it develops into an embryo.

A Man

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A man’s reproductive glands are the testicles. They produce not only sperms, but also male sex hormones. These hormones pass into the bloodstream and give a man his secondary sexual characteristics, such as a deep voice and facial hair. Sperms are stored in the epididymis, and then travel along a duct called the vas deferens. It passes through various glands, which add their secretions to form semen. During sexual intercourse, semen is ejaculated through the urethra, the tube inside the penis.