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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.
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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).
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More than 34,000 trademarked medication names and more than 10,000 generic medication names are in use in the United States.
Animal cells and the extracellular matrix (ECM)
Buck and Axel identified olfactory receptor proteins in olfactory receptor cells.
Two oxygen molecules in van der Waals contact
Periodic oscillations of the levels of glycolytic intermediates in yeast cells undergoing glycolysis
Digestion converts whole foods into individual nutrients that can be used by the body’s cells
Here we show the first three divisions of cleavage, a process that carves up a zygote’s cytoplasm. ...