The horizontal fraction bar was introduced by the Arabs.
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People about to have surgery must tell their health care providers about all supplements they take.
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If you could remove all of your skin, it would weigh up to 5 pounds.
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Prostaglandins were first isolated from human semen in Sweden in the 1930s. They were so named because the researcher thought that they came from the prostate gland. In fact, prostaglandins exist and are synthesized in almost every cell of the body.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
Examples of three types of joints found in the body.
Examples of waste and hazard containers.
Examples of four letter formats: (A) block style, (B) modified block style, (C) modified block style ...
Examples of visual fields of simple cortical cells.