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Did you know?
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?
There are 20 feet of blood vessels in each square inch of human skin.
Did you know?
The horizontal fraction bar was introduced by the Arabs.
Did you know?
Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.