|
|
According to the National Institute of Environmental Health Sciences, lung disease is the third leading killer in the United States, responsible for one in seven deaths. It is the leading cause of death among infants under the age of one year.
The familiar sounds of your heart are made by the heart's valves as they open and close.
If you could remove all of your skin, it would weigh up to 5 pounds.
As the western states of America were settled, pioneers often had to drink rancid water from ponds and other sources. This often resulted in chronic diarrhea, causing many cases of dehydration and death that could have been avoided if clean water had been available.
This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.