|
|
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.
Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.
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).
The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.
![Glaucoma. (a) A buildup of pressure within the eye cavities, often caused by a blockage of vessels t](https://biology-forums.com/gallery/47/medium_14755_14_10_12_6_36_55_93952400.jpeg)
![Glioma. (a) Illustration of a large glioma (colored area) within the left cerebral hemisphere in a s](https://biology-forums.com/gallery/47/medium_14755_14_10_12_6_48_57_94081413.jpeg)
![Meningocele. (a) A meningocele is a herniation of the meninges, usually associated with the spinal c](https://biology-forums.com/gallery/47/medium_14755_14_10_12_6_48_57_94091327.jpeg)