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68WM6 AP 3 Lymphatic

Lymphatic System and Immunity

Lymph fluid in the tisse spaces that carries protein molecules and other substances back to the blood
Lymphatic vessels permit only one-way movement of lymph
Lymphatic capillaries tiny blind-ended tubes distributed in tisse spaces, consisting of single layer of simple squamous epithelium
Lacteals located in the intestinal wall, fat transportation from food to bloodstream
Right lymphatic duct drains lymph from the right upper extremity and right side of head, neck, and upper torso
Thoracic duct largest lymphatic vessel, drain lymph from about 3/4 of the body
cisterna chyli an enlarged puch along the thoracic duct
lymph nodes filter lymph, located in clusters along the pathway of lymphatic vessels
functions of lymph nodes: defense and WBC formation
Thymus lymphoid tissue organ located in mediastinum, weight of 35-40g
Thymus cont'd plays a vital and central role in immunity, produces T-lymphocytes, or T cells
Thymosins hormones secretes by thymus
Involution replaced the lymphoid tisse is largely replaced by fat
Tonsils composed of three masses of lymphoid tisse around the openings of the mouth and throat
Palatine tonsils the tonsils
Created by: sakal