Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
Did you know?
Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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Pope Sylvester II tried to introduce Arabic numbers into Europe between the years 999 and 1003, but their use did not catch on for a few more centuries, and Roman numerals continued to be the primary number system.
Did you know?
The horizontal fraction bar was introduced by the Arabs.
Biology Is Studied at Many Levels of Organization (Part 2)
The Great Lakes— America’s “Fourth Coast”
How to find the definite integral using the fundamental theorem of calculus (Part 2)
