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Glossary
Rods
Light-sensitive cells in your eyes, which detect black and white.
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Human Body - Glossary
More Facts
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.
