Did you know?

Your heart beats over 36 million times a year.

Did you know?

There are 20 feet of blood vessels in each square inch of human skin.

Did you know?

When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

Did you know?

Thyroid conditions may make getting pregnant impossible.

Did you know?

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

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