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Cells

The tiny units which make up all the parts of your body.

Human Body - Glossary

More Facts

Cerebral cortex
The largest part of your brain. It is divided into two halves, called ...

Fertilization
The joining of a male sperm and a female egg to make a baby.

Mucus
A slimy substance which helps to protect the lining of your nose, ...

Ventricles
The two lower chambers of your heart.

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