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

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Inotropic therapy does not have a role in the treatment of most heart failure patients. These drugs can make patients feel and function better but usually do not lengthen the predicted length of their lives.

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Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

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When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.

Osteoporosis. (a) A section through normal spongy bone. (b) A section through a bone with osteoporos Osteoporosis. (a) A section through normal spongy bone. (b) A section through a bone with osteoporos
Cross section of Nasal Cavity Cross section of Nasal Cavity
A) Sagittal section of the brain; (B) lateral view of the brain. A) Sagittal section of the brain; (B) lateral view of the brain.
The nasopharynx, oropharynx, and laryngopharynx and related structures. The nasopharynx, oropharynx, and laryngopharynx and related structures.
A section of the retina. The fovea is the indentation at the center of the retina; it is specialized ... A section of the retina. The fovea is the indentation at the center of the retina; it is specialized ...
Cross-section of earthworm Cross-section of earthworm
Video: Introduction to Heart Attacks

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