First Children Encyclopedia

(Marvins-Underground-K-12) #1

Amazing facts


121


Many germs are not
harmful, but some cause
illness, and even death.

Bacteria are so small
that a thousand could
fit on the head of a pin.

The world’s most
common disease is
the common cold.

Cancer happens when
your own cells multiply
out of control.

When you recover from
an infectious disease, your
body becomes immune to it.

The most babies born to one
mother was 69. Most were
twins, triplets, or quads.

The first quintuplets
known to have survived
infancy were born in 1934.

You will make enough
urine in your lifetime
to fill 500 baths.

Asparagus can turn your
urine green. Blackberries
can turn it red.

Fighting disease


Germs are always trying


to get inside you, but


your body fights back.


Urinary system


Urine gets rid of


chemicals that your


body doesn’t need.


The fastest-growing
part of a baby’s
body is its head.

A girl is about three-
quarters of her adult
height at 7 years old.

Growth


As you grow you slowly


change into an adult,


but it takes a long time!


Reproduction


The reproductive organs


create new people from


tiny specks of matter.


The food you eat in
a year weighs as
much as a car.

You make enough spit
in your lifetime to fill
two swimming pools.

Your digestive glands
start working as soon
as you smell or see food.

Your tongue senses five
tastes: salty, sweet, sour,
bitter, and savoury.

The smell of poo comes
from a chemical called
skatole.

Digestive


system


Digestion turns


food into simple


chemicals


that your


body can


make into


new cells or


use for fuel.


Each hair on your head
grows for about 3 or 4
years and then falls out.
A new one grows in
its place.

A boy is about three-
quarters of his adult
height at 9 years old.
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