SBPMD Histology Laboratory ManualLymphoid TissuesLearning objectives:Know the structure and function of the lymphoid tissues and organs: (including afferent and efferent flow and specialized vasculature)t
Components of the Lymphatic System Central lymphoid tissue includes the thymus (encapsulated) and bone marrow (Bursal equivalent), which are the sites where development takes place. In the thymus, T cells; and in the bone marrow, B cells (as well as monocytes, erythrocytes, granulocytes and megakaryocytes). Peripheral lymphoid tissue includes:
Lymphatic vessels form an alternative channel by means of which the following are removed from the connective tissue spaces: fluid, particulate matter, protein that escapes from blood capillaries, ingested fats absorbed across the intestinal surface, disease microorganisms, other antigenic material which may penetrate the skin and other protective surfaces, and cells both normal and cancerous. This proteinaceous fluid, variably rich in particles and cells, is termed lymph and is filtered and cleansed in lymph nodes before being returned via the thoracic duct and the right lymphatic duct to the circulating blood in the great veins. Lab Activities
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