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Did you know?

The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

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Congestive heart failure is a serious disorder that carries a reduced life expectancy. Heart failure is usually a chronic illness, and it may worsen with infection or other physical stressors.

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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).

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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

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

Function and structure of aquaporin Function and structure of aquaporin
Prokaryotic cells are have a relatively simple structure Prokaryotic cells are have a relatively simple structure
The complex structure of the hemoglobin protein. The complex structure of the hemoglobin protein.
Structure of the RRM domain and its interaction with RNA Structure of the RRM domain and its interaction with RNA
The basic structure of a spermatozoon (SPERM). The basic structure of a spermatozoon (SPERM).
The basic structure of the IL-2 receptor. The basic structure of the IL-2 receptor.
Video: Enzyme structure - Properties of enzymes

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