Reader's Digest, Nicholson - Muir Productions

Describes the functions of the skin's layers, sweat glands, nerves, nerve endings, hair follicles, oil glands, and blood vessels.

Describes the functions of the skin's layers, sweat glands, nerves, nerve endings, hair follicles, oil glands, and blood vessels.

Explains the purpose of each part of the spine, how each is related to common back problems, and how to avoid back injury.

Explains the purpose of each part of the spine, how each is related to common back problems, and how to avoid back injury.