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Did you know?

Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.

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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

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Eating carrots will improve your eyesight. Carrots are high in vitamin A (retinol), which is essential for good vision. It can also be found in milk, cheese, egg yolks, and liver.

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There are approximately 3 million unintended pregnancies in the United States each year.

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Common abbreviations that cause medication errors include U (unit), mg (milligram), QD (every day), SC (subcutaneous), TIW (three times per week), D/C (discharge or discontinue), HS (at bedtime or "hours of sleep"), cc (cubic centimeters), and AU (each ear).

A blood smear. The smear reveals representative cells from each formed element group: red blood cell A blood smear. The smear reveals representative cells from each formed element group: red blood cell
Atom of the Element Lithium Atom of the Element Lithium
Elements found in the element cube Elements found in the element cube
The two skills of the element Generating Alternatives The two skills of the element Generating Alternatives
The two skills of the element Evaluation The two skills of the element Evaluation
What element(s) is/are being oxidized? What element(s) is/are being oxidized?
Video: Renin/Angiotensin (water gain from urine & Na ion and water reabsorption)

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