401002 Lecture Notes - Lecture 21: Portal Venous System, Portal Vein, Adaptive Immune System
16 Feb 2020
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Document Summary
It is responsible for the removal of interstitial fluid from tissues. It absorbs and transports fatty acids and fats as chyle from the digestive system. It transports white blood cells to and from the lymph nodes into the bones: the lymph transports antigen-presenting cells, such as dendritic cells, to the lymph nodes where an immune response is stimulated. Lymph vessels called lacteals are at the beginning of the gastrointestinal tract, predominantly in the small intestine. The enriched lymph originating in the lymphatics of the small intestine is called chyle. The nutrients that are released into the circulatory system are processed by the liver, having passed through the systemic circulation. When an antigen is recognized, an immunological cascade begins involving the activation and recruitment of more and more cells, the production of antibodies and cytokines and the recruitment of other immunological cells such as macrophages. Lymphadenopathy refers to one or more enlarged lymph nodes.
