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Thyroid conditions may make getting pregnant impossible.

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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.

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Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

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Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.

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A cataract is a clouding of the eyes' natural lens. As we age, some clouding of the lens may occur. The first sign of a cataract is usually blurry vision. Although glasses and other visual aids may at first help a person with cataracts, surgery may become inevitable. Cataract surgery is very successful in restoring vision, and it is the most frequently performed surgery in the United States.

Respiratory Alkalosis Respiratory Alkalosis
Devices used to deliver respiratory drugs: (a) metered-dose inhaler Devices used to deliver respiratory drugs: (a) metered-dose inhaler
Layers of the Digestive Tract Wall Layers of the Digestive Tract Wall
Alternate kneading and sliding on the upper arm. Knead the upper arm muscles with a hand on each ... Alternate kneading and sliding on the upper arm. Knead the upper arm muscles with a hand on each ...
The Upper Extremities The Upper Extremities
Video: Basic rhythm - control centers in medulla oblongata, spirograph and normal tidal cycle

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