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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?
In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.
Did you know?
More than 4.4billion prescriptions were dispensed within the United States in 2016.
Did you know?
There are more nerve cells in one human brain than there are stars in the Milky Way.
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.