Did you know?

The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

Did you know?

Blood is approximately twice as thick as water because of the cells and other components found in it.

Did you know?

Today, nearly 8 out of 10 pregnant women living with HIV (about 1.1 million), receive antiretrovirals.

Did you know?

This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.

Did you know?

The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

For a complete list of videos, visit our video library