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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
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Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.
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There are more bacteria in your mouth than there are people in the world.
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The average office desk has 400 times more bacteria on it than a toilet.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.