The autonomic nervous system has direct connections to the SA and AV nodes.

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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According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.

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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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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.

Tracheal Tube Respiratory System as diagrammed in a generalized insect

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The experimental system that permits observation of rotation in the F1 component of F1F0 ATP (b)

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Solar system

The two circuits of the human cardiovascular system

Author Question: The autonomic nervous system has direct connections to the SA and AV nodes. (Read 37 times)

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