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Did you know?

Anti-aging claims should not ever be believed. There is no supplement, medication, or any other substance that has been proven to slow or stop the aging process.

Did you know?

Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.

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Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.

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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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Although the Roman numeral for the number 4 has always been taught to have been "IV," according to historians, the ancient Romans probably used "IIII" most of the time. This is partially backed up by the fact that early grandfather clocks displayed IIII for the number 4 instead of IV. Early clockmakers apparently thought that the IIII balanced out the VIII (used for the number 8) on the clock face and that it just looked better.

Cross-section of a mature root. Cross-section of a mature root.
Role of calcium, tropomyosin, and troponin in cross-bridge cycling. Role of calcium, tropomyosin, and troponin in cross-bridge cycling.
Drawing of spirochete's mobility system (with internal flagellae). Drawing of spirochete's mobility system (with internal flagellae).
Cross-arm stretch of cervical muscles with neck in forward flexion. Cross-arm stretch of cervical muscles with neck in forward flexion.
Opener A colorized cross section of the human brain Opener A colorized cross section of the human brain
Cross-section of earthworm Cross-section of earthworm
Video: Automated external defibrillator (AED)

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