If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).
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About 100 new prescription or over-the-counter drugs come into the U.S. market every year.
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Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
The formation of gametes by the process of meiosis is known as gametogenesis.
The flow of information in a eukaryotic cell
Larynx, trachea, bronchi, and lungs with an expanded view showing the structures of an alveolus and