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The familiar sounds of your heart are made by the heart's valves as they open and close.

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Anti-aging claims should not ever be believed. There is no supplement, medication, or any other substance that has been proven to slow or stop the aging process.

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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

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About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

Slash-and-burn agriculture contributes to the formation of malarial environments. Slash-and-burn agriculture contributes to the formation of malarial environments.
John Lewis Krimmel’s painting of the Fourth of July in Centre Square Philadelphia (1812) shows the d John Lewis Krimmel’s painting of the Fourth of July in Centre Square Philadelphia (1812) shows the d
Third-degree heart block. Third-degree heart block.
Assessing the degree of the burn. Bottom photos show (A) first-degree burn (sunburn) and (B) ... Assessing the degree of the burn. Bottom photos show (A) first-degree burn (sunburn) and (B) ...
Cylinder 1 slit signals the computer the piston position for cylinder 1. The 1-degree slits provide ... Cylinder 1 slit signals the computer the piston position for cylinder 1. The 1-degree slits provide ...
The enthalpy change for converting 10.0 g of ice at -25.0 C to water at 80.0 C is ________ kJ. ... The enthalpy change for converting 10.0 g of ice at -25.0 C to water at 80.0 C is ________ kJ. ...
Video: Stretch reflex & Tendon reflex

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