101 Amazing Facts About The Human Body by Jack Goldstein

Author:Jack Goldstein
Language: eng, eng
Format: epub, mobi, pdf
Tags: biology, school, project, brain, bones, breath, digestion, reproduction, vision, eyes, nose, ear, throat, limb, finger, poo, baby, heart, trivia, fun, facts, interesting, learn, class, exciting
ISBN: 9781782348948
Publisher: Andrews UK
Published: 2013-05-06T16:00:00+00:00

The Reproductive System

Men produce approximately ten million sperm every single day.

The largest cell in the human body is the female egg...

...And the smallest is the male sperm.

The average man has an erection every hour or so whilst asleep.

The scrotum - which holds sperm - sits outside a man’s body. This is because internal body temperature would actually kill the sperm!

When a baby is in the womb, it is covered by a layer of hair which disappears at birth - this is called the lanugo.

Because of the production of their mother’s hormones during pregnancy, a baby can produce a small amount of milk from its mammary glands for a week after birth.

A woman is actually born with all the eggs she will need during her lifetime.

The average ejaculation releases around three hundred million sperm.

Both sperm and egg only contain half the DNA required to create a human being - it is of course only when they join together that the jigsaw of a new person is completed.

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