Page 227 - DK Children's Encyclopedia

Sickness SEE ALSO

▸ ▸ Body cells p.41
▸ ▸ Human body
Tiny living things called germs can make us sick if they get p.130
inside our bodies. Germs are all around us—in the air, in our ▸ ▸ Medicine p.160
food, and on the things we touch. Our bodies have many ▸ ▸ Microscopic life

different ways to stop them from harming us. p.165
▸ ▸ Skin p.229

▸ ▸ Taste p.249
Body defenses
The body has a defense system to
stop germs from getting in. It also Tears
kills germs that find a way in. Watery tears wash dirt
out of our eyes. They also
kill germs.
Mucus (nose and throat)
Mucus traps germs we Ear wax
breathe in. Hairs move the Ear wax flows out of our
mucus to the mouth, where ears, pushing germs and
the germs and mucus get dirt out with it.
swallowed.
Saliva
Senses Also known as spit, saliva
protects your mouth by
Sight, smell, and taste killing germs.
help us avoid eating
food that has gone bad.

Skin White blood cells
Skin stops germs Tiny white blood
from entering the cells in your blood kill
body by forming a germs in the body. Avoiding
protective barrier.
sickness
Covering our nose and
Acid mouth when we sneeze
Chemicals in or cough stops germs from
1,000 kill most germs spreading through the air.
the stomach
we swallow.

germs can fit on
the head of a pin.
They’re tiny!

Good bacteria
Helpful bacteria in
our intestines stops
germs from growing.
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