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Did you know?

There are 20 feet of blood vessels in each square inch of human skin.

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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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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.

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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

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The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.

Organisms exhibit a diversity of behaviours, which include (clockwise from upper left), foraging and Organisms exhibit a diversity of behaviours, which include (clockwise from upper left), foraging and
The most commonly used socket drive sizes include 1/4, 3/8, and 1/2 inch drives. The most commonly used socket drive sizes include 1/4, 3/8, and 1/2 inch drives.
Reconstruction Drawing of the Agora (Marketplace), Athens Reconstruction Drawing of the Agora (Marketplace), Athens
School-age children enjoy classifying objects School-age children enjoy classifying objects
Heart drawing by 6 years old Heart drawing by 6 years old
Grade 1 Drawing Grade 1 Drawing
Video: Energy inputs and release in glycolysis Animation

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