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Did you know?

Asthma cases in Americans are about 75% higher today than they were in 1980.

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Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

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Chronic marijuana use can damage the white blood cells and reduce the immune system's ability to respond to disease by as much as 40%. Without a strong immune system, the body is vulnerable to all kinds of degenerative and infectious diseases.

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The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.

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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

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Video: Types of synapses - electrical & chemical

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