IgA antibodies protect body surfaces exposed to outside foreign substances. IgG antibodies are found in all body fluids. IgM antibodies are the first type of antibody made in response to an infection. IgE antibody levels are often high in people with allergies. IgD antibodies are found in tissues lining the abdomen and chest.
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In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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The Babylonians wrote numbers in a system that used 60 as the base value rather than the number 10. They did not have a symbol for "zero."
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Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.
The work of Charles Darwin forms the foundation for modern evolutionary theory.
Epiphyseal Usually occurs through the growth plate where the matrix is undergoing calcification and
Children with Down syndrome have a small head, short, thick neck, flattened face, and a distinctive ...
World of Children
Children: A Chronological Approach, Canadian Edition