Sc F3 Detail.docx
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Detail: Form 3 Science 1. There are two types of white blood cells: a. Lymphocytes: Produce antibodies to kill gems b. Phagocytes: Carry out phagocytosis (eat bacterium) 2. a. Donated blood is collected in plastic bags which contain sodium citrate (prevent coagulating). b. Tested and screened for hepatitis B and C, AIDS and other sexually transmitted disease. c. The blood is stored in blood banks of hospitals.
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