Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.
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Women are 50% to 75% more likely than men to experience an adverse drug reaction.
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Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.
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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 same star field photographed with (a) a ground-based telescope, which is subject to poor seeing
A typical ball-peen hammer.
Typical joint.
Typical box used for the disposal of bagged, sealed, and autoclaved biological waste.
Typical Work Settings for Massage Therapists
Typical sequence of tooth eruption for both deciduous and permanent teeth