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Excessive alcohol use costs the country approximately $235 billion every year.

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Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.

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Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.

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Chronic necrotizing aspergillosis has a slowly progressive process that, unlike invasive aspergillosis, does not spread to other organ systems or the blood vessels. It most often affects middle-aged and elderly individuals, spreading to surrounding tissue in the lungs. The disease often does not respond to conventionally successful treatments, and requires individualized therapies in order to keep it from becoming life-threatening.

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Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).

Photograph of the flea that transmits Yersinia pestis to cause bubonic plague, called the oriental r Photograph of the flea that transmits Yersinia pestis to cause bubonic plague, called the oriental r
Time Line of Human History From Upper Paleolithic Period to the Present Time Line of Human History From Upper Paleolithic Period to the Present
Human photopic (cone) and scotopic (rod) spectral sensitivity curves. The peak of each curve has ... Human photopic (cone) and scotopic (rod) spectral sensitivity curves. The peak of each curve has ...
The mesotelencephalic dopamine system in the human brain, consisting of the nigrostriatal pathway ... The mesotelencephalic dopamine system in the human brain, consisting of the nigrostriatal pathway ...
Structural organization of chromatin in the human centromere Structural organization of chromatin in the human centromere
A transgenic mouse carrying a mutation in the human SOD1 gene that causes paralysis of the limbs. In A transgenic mouse carrying a mutation in the human SOD1 gene that causes paralysis of the limbs. In
Video: Blood Pressure Measurement

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