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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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People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.

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After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.

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To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.

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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

Kelp forest structure. Kelp forest structure.
Structure of the enzyme chymotrypsin, a globular protein Structure of the enzyme chymotrypsin, a globular protein
General structure of eukaryotic pre-rRNA transcription units General structure of eukaryotic pre-rRNA transcription units
Structure of a nail Structure of a nail
Skeletal Structure of a Hog Skeletal Structure of a Hog
Sensory systems and Endocrine system Sensory systems and Endocrine system
Video: Secondary Active Transport

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