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Author Question: The Maya agricultural system was based on A) slash-and-burn farming. B) chinampa farming. C) ... (Read 113 times) |
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.
Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.
There are more bacteria in your mouth than there are people in the world.
After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.