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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.

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The average older adult in the United States takes five prescription drugs per day. Half of these drugs contain a sedative. Alcohol should therefore be avoided by most senior citizens because of the dangerous interactions between alcohol and sedatives.

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Limit intake of red meat and dairy products made with whole milk. Choose skim milk, low-fat or fat-free dairy products. Limit fried food. Use healthy oils when cooking.

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Oliver Wendell Holmes is credited with introducing the words "anesthesia" and "anesthetic" into the English language in 1846.

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People who have myopia, or nearsightedness, are not able to see objects at a distance but only up close. It occurs when the cornea is either curved too steeply, the eye is too long, or both. This condition is progressive and worsens with time. More than 100 million people in the United States are nearsighted, but only 20% of those are born with the condition. Diet, eye exercise, drug therapy, and corrective lenses can all help manage nearsightedness.

Cerebral aneurysm. A cerebral aneurysm is the abnormal dilation of arteries supplying the brain, whi Cerebral aneurysm. A cerebral aneurysm is the abnormal dilation of arteries supplying the brain, whi
Arteriogram of the left carotid artery and cerebral arteries. Arteriogram of the left carotid artery and cerebral arteries.
Cerebral Vascular Accident - Left Cerebral Vascular Accident - Left
The lobes of the cerebral hemishphere. The lobes of the cerebral hemishphere.
An infant begins to notice the external environment by the age of 4 to 8 months An infant begins to notice the external environment by the age of 4 to 8 months
Frontal section of primary somatosensory area in right cerebral hemisphere Frontal section of primary somatosensory area in right cerebral hemisphere
Video: Chloroplast Structure & Light Dependent Reactions (Photosystem 1 and 2 Cyclic Electron Flow)

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