Drosophila
...the bloodstream from. The immune system works mainly from cells being produced inside the bone marrow. They learn about the vaccines through the lymphocytes. The two classes of lymphocytes are B cells, which grow to thymus, and T cells, which mature in the thymus. These cells start the Antibodies, where B cells produce basic templates with a special region to target antigens. When antibodies form with antigens, they start cascades of nine proteins called complement, which circulates inactive forms of blood. The T cells have two major roles in the system. Regulatory T cells are essential for orchestrating the response of a system of types of immune cells. Helper T cells alert B cells to make antibodies, and also can activate other cells to influence which type of antibody is produced. Positive T cells can become killer cells that attack and destroy the infected cells. The fly has a different immune system than that of the human. The fly has four pairs of chromosomes: the X/Y sex chromosomes and the autosomes 2, 3 and 4. The size f their genome is about 165 million bases and contains and estimated 14,000 genes. The drosophila life cycle starts with one day of fertilization for the embryo developing into a worm like larva. The larva grows and hatches on the fourth day. It then moults again to form an immobile pupa. The next four days, its body is remodelled to give the adult winged form, which hatches from the pupal and is fertile, the...