Histology practical write up Essay Example | Topics and Well Written Essays - 1000 words

Histology practical write up - Essay ExampleUpon the maturation of the beneficial T cells, they argon released into the birth. The thymus is a primary lymphoid organ (Paul, 2013).The quick temper on its part is an immunologic tune filter. The spleen is of T cells, B cells, dendritic cells, natural orca cells, red crease cells and macrophages. The spleens functions by capturing antigens from the blood passing through the spleen. The migratory macrophages together with the dendritic cells transport the foreign bodies to the spleen through the blood stream. When the antigens get to the spleen and gets into contact with the appropriate B or T cells, an immune response is initiated. The B cells once activated produces large amounts of antibody which kills the antigen as well as aged red blood cells. The spleen contains two types of T-cells which ar helper T-cells and killer T-cells. The helper T-cells are responsible for systematising the attack while the killer T-cells destroys the infected cell since it has then been turned into a virus reproduction factory. The spleen is a unessential lymphoid organ since it contains both T and B cells and requires an antigen entry to stimulate the lymphoid cells (Turgeon, 2014).Since the tissue sections are in arise, they are placed in hot plates for 2 minutes till all the wax is melted, and no traces of wax found in the tissues. Within a two-minute interval, the tissues are placed in living alcohol, 90% alcohol and 70% alcohol. In order to stain the tissues, they are placed in Ehrlichs Haematoxylin for 45 minutes. Since this is a regressive stain, over stained tissues will have the stain solution aloof with a tissue paper and rinsed for 30 minutes with tap water. The tissues should appear bluish purple/ off-key blue.The tissues are in acidic alcohol for 4 minutes and turn red. Immediately the slides are ready into ammoniated alcohol and will turn blue. Within two-minute duration, the tissue