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Mucus

A slimy substance which helps to protect the lining of your nose, lungs and stomach.

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.

Neurones
Another name for nerve cells.

Vertebrae
The separate bones which make up your spine, or backbone.

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