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Did you know?

Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.

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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

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Vaccines cause herd immunity. If the majority of people in a community have been vaccinated against a disease, an unvaccinated person is less likely to get the disease since others are less likely to become sick from it and spread the disease.

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No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.

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Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.

Loewi's experimental discovery of chemical neurotransmission. Loewi's experimental discovery of chemical neurotransmission.
11.2 The chemical structure of mescaline, derived from the peyote cactus 11.2 The chemical structure of mescaline, derived from the peyote cactus
Application of a Cold Chemical Pack Application of a Cold Chemical Pack
Chemical, Biochemical, and Organic Sedimentary Rocks Chemical, Biochemical, and Organic Sedimentary Rocks
Water in Chemical Reactions Water in Chemical Reactions
Similarity of the chemical structure of 5-bromouracil (5-BU) and thymine Similarity of the chemical structure of 5-bromouracil (5-BU) and thymine
Video: The Pressure Flow Model in a Plant

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