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Did you know?

When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

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The horizontal fraction bar was introduced by the Arabs.

Did you know?

Though “Krazy Glue” or “Super Glue” has the ability to seal small wounds, it is not recommended for this purpose since it contains many substances that should not enter the body through the skin, and may be harmful.

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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

Did you know?

Everyone has one nostril that is larger than the other.

Darwin observed that tortoises on islands that are arid tend to have saddle-shaped shells, allowing Darwin observed that tortoises on islands that are arid tend to have saddle-shaped shells, allowing
Color Vision Color Vision
Unregulated populations "J-shaped curve" Unregulated populations "J-shaped curve"
Testing near vision Testing near vision
All human organ systems and their functions (Part 1) All human organ systems and their functions (Part 1)
Energy homeostasis is regulated primarily by the brain, gastrointestinal tract, other organ systems, Energy homeostasis is regulated primarily by the brain, gastrointestinal tract, other organ systems,
Video: Neuron structure and function - sensory neurons, association neurons & motor neurons

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