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Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.

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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.

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Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

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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.

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By definition, when a medication is administered intravenously, its bioavailability is 100%.

Skin of an African (left) and Asian (right) elephant. Skin of an African (left) and Asian (right) elephant.
Structures of the Skin Structures of the Skin
Color-enhanced CT scan showing two malignant tumors in the brain. Color-enhanced CT scan showing two malignant tumors in the brain.
A color-enhanced midsagittal MRI scan. A color-enhanced midsagittal MRI scan.
Uticaria, a skin rash caused by type I hypersensitivity. Uticaria, a skin rash caused by type I hypersensitivity.
The X-linked genetic model of Morgan’s eye-color inheritance The X-linked genetic model of Morgan’s eye-color inheritance
Video: Energy sources - types

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