Page 130 - DK Children's Encyclopedia

Heart SEE ALSO

▸ ▸ Body cells p.41
▸ ▸ Brain p.45
The heart is a pump about the size of a fist. It is mainly ▸ ▸ Feelings p.99
made of muscle and it pushes blood around the body ▸ ▸ Human body
by squashing itself in and out around 80 times a minute. p.130

Blood is a liquid that carries oxygen and food around the ▸ ▸ Lungs p.149
body. If the heart stops beating, the body stops working. ▸ ▸ Medicine p.160

Inside the heart Circulation
The heart pumps blood Blood with oxygen in it travels
every second of the day. This artery carries around the body, pumped along
blood without
The right side of the heart oxygen to the lungs. by the heart. The oxygen is
sends blood to the lungs. dropped off in different places,
The left side sends blood then comes back to the heart
to the rest of the body. to be pushed to the lungs.

Artery
Atrium
The heart has two
“chambers” on each Vein
side, called atriums.
Heart

Valve
Valves are gates that
only open one way, so
blood can only travel
in one direction.

Blood
Blood contains tiny parts
called cells. Red blood cells
carry oxygen and waste
gas. White blood cells kill
germs. Broken bits of cells
stick together to make a
scab when the body is cut.

Vein Artery
Blood arrives from Blood is pushed
the body through out to the body in
tubes called veins. tubes called arteries.
Blood vessels

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