Photograph by Shannon Stapleton, Reuters

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A full-body human specimen injected with a polymer preservative stands on display at an exhibition called "Bodies." The show features 22 whole-body specimens and over 260 organs and partial-body specimens, designed to give visitors an insight into the inner workings of the human body.

Photograph by Shannon Stapleton, Reuters

Science & InnovationReference

The Human Body

The human body is an amazing machine. Find out how it works, from head to toe.

Brain

Stimulate the brain and find out how this fantastically complex organ is the body's primary control center.

Heart

Every cell in the body depends on this muscle, the body's hardest-working organ.

Digestive System

Feed the body different foods and discover how this system is the body's fuel factory.

Lungs

Learn how the lungs provide the breath of life and see the debilitating effects of asthma.

Skin

Watch how aging and stresses like cuts and sunlight can affect the body's largest organ.

Human Body 101 The human body performs amazing feats every day, from sending signals rocketing through the brain at high speed to distributing oxygen over 1,000 miles (1,600 kilometers) of airways.