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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.
Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.
The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
More than 4.4billion prescriptions were dispensed within the United States in 2016.
When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.