Some five million hairs grow from your skin; yet a network of fine blood vessels is directed to the root of every hair. The care given to each tiny hair is something to wonder at. “Do not become fearful,” Jesus assured his disciples, “the very hairs of your head are all numbered.”​—Matthew 10:28, 30.

The contents of the blood enable your body to make an estimated three billion new cells every minute. The growth of hair is a result of cells multiplying at the root.

[Diagram on page 17]

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A network of blood vessels is directed to the root of each body hair

Hair follicle

Blood vessel