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Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.
Did you know?
The human body produces and destroys 15 million blood cells every second.
Did you know?
According to the CDC, approximately 31.7% of the U.S. population has high low-density lipoprotein (LDL) or "bad cholesterol" levels.
Did you know?
There are more nerve cells in one human brain than there are stars in the Milky Way.