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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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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

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Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.

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Vaccines prevent between 2.5 and 4 million deaths every year.

group of hinds with calves group of hinds with calves
Distribution of bonding and outer nonbonding electrons in the peptide group Distribution of bonding and outer nonbonding electrons in the peptide group
Tickler file using a file drawer. Tickler file using a file drawer.
Students working in a group Students working in a group
In 1974 a UC Berkeley group fired an oxygen nucleus at a californium target. Giv In 1974 a UC Berkeley group fired an oxygen nucleus at a californium target. Giv
Splicing mechanism for removal of group I introns Splicing mechanism for removal of group I introns
Video: Cellular defenses (natural killer cells, phagocyte types & process of phagocytosis)

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