There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
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Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.
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Limit intake of red meat and dairy products made with whole milk. Choose skim milk, low-fat or fat-free dairy products. Limit fried food. Use healthy oils when cooking.
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On average, the stomach produces 2 L of hydrochloric acid per day.
Fluid compartments in a typical vertebrate.
Schematic of typical animal cell depicting the various organelles and structures.
A typical 1/2 inch drive air impact wrench. The direction of rotation can be changed to loosen or ...
Typical Reverse Osmosis Filter Setup
A typical Dam
Typical leaf structure of eudicots (left) and monocots (right).