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Lymphatic/ immune system (Lymph, lymph vessels, lymph drainage (Lymph…
Lymphatic/ immune system
Major functions
•take up interstitial fluid, and eventually return the fluid to blood
•take up/absorb lipid from the small intestines
•work with the immune system to combat foreigners
Lymph, lymph vessels, lymph drainage
Lymph
Blood
•connective tissue with various cells
•abulins and gobulins stay in the blood
•have slow leak of proteins out of the blood
Interstitial fluid
•similar to blood
•fewer blood proteins and fewer blood cells
•leukocytes may be in interstitial fluid
•anything a cell would expel
Lymph
•is interstitial fluid in lymph vessels
•very few proteins
•No red blood cells
•can find glucocytes
Lymph vessels
Lymph vessels
•only epithelial tissue in capillaries
•easily take in interstitial fluid
•have valves to keel lymph moving
•lymph circulation is not a circuit
•fluid moves into capillaries and acts and valves
•once fluid is in can’t go back out
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Lymphatic cells, structure, organs
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Major lymph nodes
Lymphocyte
•structure-shaped like a bean, vessels are afferent and lymph vessels, 1-2 efferent vessels that leave the lymph node
•composed of reticular tissue that provides a lot of space so fluid can easily move through
•function- destruction of foreign cells
•location- cervical, inguinal and mammary lymph nodes
M.A.L.T.
•structure- loose C.T. with abundant lymphocytes
•function- destroy foreign cells as they enter the body, prevent infections
•location- anywhere there’s an opening. Digestive system, urinary system, respiratory system, reproductive system
Tonsils
•location- tubual, pharyngeal, palatine, and lingual tonsils
•function- to trap foreign cells, destroy foreign cells, and create memory lymphocytes
Thymus and spleen
Thymus
•location- above heart
•structure- epithelial tissue, lobules
•function- where T-lymphocytes are created w
Spleen
•location- next to the stomach
•structure- sinusoid capillaries, reticular tissue
•function- destroys pathogens and recycled old erythrocytes we
leukocytes
Granulocytes
•Neutrophils- bacteria destroying, most abundant
•Eosinophils- phagocytes for allergens, destroys parasites, found in the digestive system
•Basophils- secrete a substance that brings about inflammation
Agranulocytes
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Monocytes
• in blood vessels
• go into your tissues
• once in tissue they are called macrophages
• large