When an immune response is initiated there is an

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Unformatted text preview: The dendritic cells are the most important antigen presenting cells. The transition point between innate immunity with low specificity and the adaptive immunity that are exquisitely specific. This is a cytotoxic cell. Lymphocytes are mostly small, inactive cells. Distribution of lymphoid tissues in the body IN addition to the circulatory vascular system, there is a parallel system called the lymphatic. These two systems join in the neck at the thoracic duct. The two systems are joined so that there is a constant circulation of immune cell from the blood to the lymphatic and back again. There are strategically placed filters (lymph nodes) around the lymph channels. These are more concentrated towards the center. They contain a lot of the cellular elements discussed, i.e. macrophages, dendritic cells, and lymphocytes. It is in these tissues that adaptive immune responses are generated. The object of the lymph nodes is to give dendritic cells and the lymphocytes to intercept pathogen. When an immune response is initiated, there is an enormous cell division of B and...
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This document was uploaded on 03/23/2014 for the course BIOL 358 at Georgetown.

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