Did you know?

Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.

Did you know?

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

Did you know?

Asthma cases in Americans are about 75% higher today than they were in 1980.

Did you know?

Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.

Did you know?

The familiar sounds of your heart are made by the heart's valves as they open and close.

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