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
