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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).
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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
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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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Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.
Epiphyseal Usually occurs through the growth plate where the matrix is undergoing calcification and
In many industrialized nations, men are having children at older ages, raising the possibility of ...
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Development of Morality in Young Children
![Given the values of sin θ, determine the values of θ over the interval [0, 2pi]](https://biology-forums.com/gallery/42/medium_6_04_01_21_12_54_15.png)
Given the values of sin θ, determine the values of θ over the interval [0, 2pi]
The system of naming chromosome bands. Each autosome is numbered from 1 to 22. The sex chromosomes a