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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.
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The horizontal fraction bar was introduced by the Arabs.
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Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.
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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.