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Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
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?
Approximately 500,000 babies are born each year in the United States to teenage mothers.
Did you know?
Medication errors are more common among seriously ill patients than with those with minor conditions.
Did you know?
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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