Blood is approximately twice as thick as water because of the cells and other components found in it.
Did you know?
More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.
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It is difficult to obtain enough calcium without consuming milk or other dairy foods.
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The U.S. Pharmacopeia Medication Errors Reporting Program states that approximately 50% of all medication errors involve insulin.
Did you know?
Medication errors are more common among seriously ill patients than with those with minor conditions.
Human Body Glands and Hormones
An old concept of genetic transmission—a homunculus in a sperm cell.
Human infants are like all other placental mammals, except they are born at a less developed state.
Human Development (Full Term)
All human organ systems and their functions (Part 1)