|
Author Question: Examine the effects of long-term and extreme stress on children's ability to learn. What brain ... (Read 87 times) |
A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.
Asthma cases in Americans are about 75% higher today than they were in 1980.
If you could remove all of your skin, it would weigh up to 5 pounds.
Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).
On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.