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Glossary
Sebum
A natural oil made in your skin. It keeps skin supple and waterproof.
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Human Body - Glossary
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Cells
The tiny units which make up all the parts of your body.
Epidermis
The upper layer of your skin, above the dermis.
Melanin
Dark pigment which gives hair, skin and eyes some of their colour.
Ventricles
The two lower chambers of your heart.