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People about to have surgery must tell their health care providers about all supplements they take.

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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."

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Many people have small pouches in their colons that bulge outward through weak spots. Each pouch is called a diverticulum. About 10% of Americans older than age 40 years have diverticulosis, which, when the pouches become infected or inflamed, is called diverticulitis. The main cause of diverticular disease is a low-fiber diet.

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No drugs are available to relieve parathyroid disease. Parathyroid disease is caused by a parathyroid tumor, and it needs to be removed by surgery.

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Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).

The oral cavity: (A) sagittal section; (B) anterior view as seen through the open mouth. The oral cavity: (A) sagittal section; (B) anterior view as seen through the open mouth.
A cross section of a lymph node. A cross section of a lymph node.
Ford uses an inertia switch to turn off the electric fuel pump in case of an accident. Ford uses an inertia switch to turn off the electric fuel pump in case of an accident.
A Corner of the General Massage Section of an Army Hospital. A Practice of Physiotherapy by Sampson, ... A Corner of the General Massage Section of an Army Hospital. A Practice of Physiotherapy by Sampson, ...
CSF Flow - Sagittal section of brain and spinal cord CSF Flow - Sagittal section of brain and spinal cord
Cross-section of earthworm Cross-section of earthworm
Video: Major Elements in Biological Molecules: Carbohydrates

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