More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.
Did you know?
Your heart beats over 36 million times a year.
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Vaccines prevent between 2.5 and 4 million deaths every year.
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All adults should have their cholesterol levels checked once every 5 years. During 2009–2010, 69.4% of Americans age 20 and older reported having their cholesterol checked within the last five years.
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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.
Abnormal Growth in Mice Mammary Tissue
Water cabbage
Interrelationships of the integumentary system with other body systems
Two water pipes together can fill a certain tank in 6 h