The red pulp contains venous sinuses filled with blood and disease preventing

The red pulp contains venous sinuses filled with

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arteries. The red pulp contains venous sinuses filled with blood and disease-preventing cells such as lymphocytes and macrophages. Blood enters the spleen through the splenic artery. The blood is cleansed as it slowly flows through the spleen. Microorganisms trapped by the spleen are destroyed by the leukocytes in the spleen. The cleansed blood leaves the spleen through the splenic vein The spleen stores blood, especially platelets. (As much as 30% of the platelets are stored in the spleen.) The spleen also destroys and phagocytoses old, worn-out red blood cells (RBCs). The spleen plays a role in fetal erythropoiesis Lymphatic Nodules Tonsils are partially encapsulated lymph nodes in the throat area. They filter tissue fluid contaminated by pathogens that enter the body through the nose and mouth. The names of the tonsils are as follows: o The palatine tonsils (there are two) are small masses of lymphoid tissue located at the opening of the oral cavity into the pharynx. A tonsillectomy is most often performed on this particular set of tonsils. o The pharyngeal tonsil is also called the adenoid and is located near the opening of the nasal cavity in the upper pharynx. The adenoid atrophies during adolescence. Enlargement of the
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adenoid may interfere with breathing and may require surgical removal, a procedure known as adenoidectomy. o The lingual tonsils (there are two) are located at the back of the tongue. MALT refers to mucosal-associated lymphatic tissue; it is lymphatic tissue that is diffusely scattered throughout the body in its mucous membranes. It is found in the organs of the respiratory, digestive, urinary, and reproductive tracts. Peyer’s patches refer to lymphatic nodules found in the lower part of the small intestine (part of the digestive tract). The appendix i s an outpouching located within the large intestine that contains lymphatic nodules. Both lymphatic structures are busily involved with a heavy load of microorganisms.
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  • Fall '19
  • right lymphatic duct

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