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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.
Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.
The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
Medication errors are more common among seriously ill patients than with those with minor conditions.
On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.