Thames & Kosmos Kids First: The Human Body (Version 2) handleiding

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Thames & Kosmos

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DID YOU KNOW?

You can also see the blood inside your body from the outside.

Blood doesn’t just slosh around in your body. It flows in

narrow tubes known as veins or blood vessels. A lot of

blood vessels are visible under the skin as blue lines. Even

though your blood is actually red, it looks blue from the

outside — because it is covered by skin and tissue. Now you

can also understand why you sometimes get blue

bruises: When you bump yourself, tiny little vessels

burst in that spot. Luckily,

they usually quickly heal

again, but a little blood collects under the

skin. That’s the blue bruise! Later on it can even turn

yellow or green.

And what happens when you turn red? The skin is also

crisscrossed with a network of tiny blood vessels.

When you get excited or embarrassed, more blood

flows through the skin and through the little

vessels. It’s particularly easy to see on your neck

and face: Your skin turns really red!

Bonus Experiment:

There are also other places on your body where you can

feel your pulse. Try it on your neck and foot!

Feel It!

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