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Did you know?

Blood is approximately twice as thick as water because of the cells and other components found in it.

Did you know?

Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

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Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.

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Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

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The most dangerous mercury compound, dimethyl mercury, is so toxic that even a few microliters spilled on the skin can cause death. Mercury has been shown to accumulate in higher amounts in the following types of fish than other types: swordfish, shark, mackerel, tilefish, crab, and tuna.

Diaphragm, the major muscle of breathing. Diaphragm, the major muscle of breathing.
Magnetic resonance imaging (MRI). The MRI lab includes the scanning instrument and a computer statio Magnetic resonance imaging (MRI). The MRI lab includes the scanning instrument and a computer statio
Pelvis of male versus female Pelvis of male versus female
A physician uses a portable electronic tablet to enter patient data while in the examination room. A physician uses a portable electronic tablet to enter patient data while in the examination room.
The traditional human karyotypes derived from a normal female and a normal male The traditional human karyotypes derived from a normal female and a normal male
Video: Exercise and cardiac output

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