|
|
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
Did you know?
Illicit drug use costs the United States approximately $181 billion every year.
Did you know?
Medication errors are more common among seriously ill patients than with those with minor conditions.
Did you know?
The average adult has about 21 square feet of skin.