If you could remove all of your skin, it would weigh up to 5 pounds.
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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 longest a person has survived after a heart transplant is 24 years.
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People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
The life cycle of a typical fern.
A typical termite colony
A typical open-end wrench. Note the size difference on each end and that the head is angled 15 ...
A typical peak-and-hold fuel-injector waveform. Most fuel injectors that measure less than 6 ohms ...
Typical life cycle of the tick family.
A typical massage room has adequate space for equipment and pleasant decorations.