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Did you know?

IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.

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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.

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Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.

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The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.

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Medication errors are three times higher among children and infants than with adults.

The frontal lobe (green) bounded by the Sylvian fissure (yellow line) and central sulcus (red line), The frontal lobe (green) bounded by the Sylvian fissure (yellow line) and central sulcus (red line),
The engine is rotated until the timing marks on the front of the crankshaft line up with zero ... The engine is rotated until the timing marks on the front of the crankshaft line up with zero ...
Fuel should be heard returning to the fuel tank at the fuel return line if the fuel-pump and ... Fuel should be heard returning to the fuel tank at the fuel return line if the fuel-pump and ...
The demand for energy is met by burning coal and other fossil fuels The demand for energy is met by burning coal and other fossil fuels
The original Supply and Demand graph The original Supply and Demand graph
A 2.8-kg tool can move on a perfectly smooth ramp that slants at 42° above the horizontal. ... A 2.8-kg tool can move on a perfectly smooth ramp that slants at 42° above the horizontal. ...
Video: Predator- prey competition and symbiosis

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