Red blood cells

Hair cell in the ear

Blood vessels emerging from the optic nerve

Human egg with coronal cells

Sperm on the surface of a human egg

Human embryo and sperm

Coloured image of a 6 day old human embryo implanting

Tooth plaque

Split end of human hair

Alveoli in the lung

Purkinje neurons

Tongue with taste bud

Villi of small intestine

Blood clot

Lung cancer cells

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