BIOL-2230 Chapter Notes - Chapter 20: Trabecula, Mucosa-Associated Lymphoid Tissue, Thoracic Duct
26 Feb 2017
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Document Summary
Lymphatic system: system consisting of lymphatic vessels, lymph nodes, and lymph; drains excess tissue fluid from the extracellular space. Lymphatics: general term used to designate the lymphatic vessels that collect and transport lymph. Lacteal: special lymphatic capillaries of the small intestine that take up lipids. Thoracic duct: large duct that receives lymph drained from the entire lower body, the left upper extremity, and the left side of the head and thorax. Cisterna chyli: an enlarged sac at the base of the thoracic duct; the origin of the thoracic duct. Lymphocyte: agranular white blood cell that arises from bone marrow and becomes functionally mature in the lymphoid organs of the body. T cells: lymphocytes that mediate cellular immunity; include helper, cytotoxic, regulatory, and memory cells. B cells: also called b lymphocytes; oversee humoral immunity; their descendants differentiate into antibody-producing plasma cells. Plasma cells: members of a b cell clone; effector b cells specialized to produce and release antibodies.
