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Did you know?
When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.
Did you know?
In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).
Did you know?
Blood is approximately twice as thick as water because of the cells and other components found in it.
Did you know?
Asthma cases in Americans are about 75% higher today than they were in 1980.
Did you know?
On average, the stomach produces 2 L of hydrochloric acid per day.