Human Body Series: Blood

Zusatztext

There is a special fluid that circulates throughout your body.
 What is it? Of course, it's blood, that red, sticky liquid that oozes out of you when you cut yourself.
 Your blood performs important functions. It transports useful things to your body, such as oxygen from the air you breathe and carries the nutrients from the food you eat to every part of your body.
 Blood also collects waste, such as carbon dioxide, and removes it from your body. One of the functions of your blood, this highly beneficial fluid, is to help your body fight harmful germs.

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