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Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

Did you know?

Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.

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Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.

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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.

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Asthma cases in Americans are about 75% higher today than they were in 1980.

Human Eye Diagram Human Eye Diagram
Types of tissue in the human body. Types of tissue in the human body.
The anterior and posterior human skeleton. The anterior and posterior human skeleton.
The motor homunculus: the somatotopic map of the human primary motor cortex. Stimulation of sites in ... The motor homunculus: the somatotopic map of the human primary motor cortex. Stimulation of sites in ...
Annotation of a DNA sequence containing part of the human globin gene Annotation of a DNA sequence containing part of the human globin gene
Phylogenetic relationships among Hawaiian Drosophila species Phylogenetic relationships among Hawaiian Drosophila species
Video: Knee Animation

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