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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

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The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.

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Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.

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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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More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.

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