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Did you know?

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

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Cyanide works by making the human body unable to use oxygen.

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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

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As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.

An enlarged heart showing the results of cardiomyopathy. An enlarged heart showing the results of cardiomyopathy.
The cardiovascular system. A schematic view of the closed circulation of blood. The heart is section The cardiovascular system. A schematic view of the closed circulation of blood. The heart is section
Human Sperm greatly enlarged Human Sperm greatly enlarged
A shim (or half shim) may be needed to provide the proper clearance between the flywheel teeth of ... A shim (or half shim) may be needed to provide the proper clearance between the flywheel teeth of ...
Normal and enlarged tonsils. Normal and enlarged tonsils.
The minimum number of moles of oxygen needed to completely consume 4 moles of C3H8O is ... The minimum number of moles of oxygen needed to completely consume 4 moles of C3H8O is ...
Video: Plant Defense Mechanisms from Pathogens

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