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Did you know?

Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.

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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

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The average adult has about 21 square feet of skin.

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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

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The longest a person has survived after a heart transplant is 24 years.

The major muscles of the human body, anterior side. The major muscles of the human body, anterior side.
Human Population Blasts Off Human Population Blasts Off
The Metabolism of Alcohol in the Human Body The Metabolism of Alcohol in the Human Body
A wide variety of pathogens may live on or in the human body A wide variety of pathogens may live on or in the human body
Four Butterflies, Two Species Four Butterflies, Two Species
Cladogram showing genetic distances and relationships between human populations Cladogram showing genetic distances and relationships between human populations
Video: Heart Chambers

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