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Lymphatic
Capillaries
Origin of lymphatic vascular networkOriginate as dead-end or blind tubesNo internal valvesHighly permeable - epithelial cells overlap forming a flap so IF flows into it but not out of itLacteals: in wall of SI, where digested fat is absorbed, assist in lipid transportationContain none of this: cartilage, epidermis, cornea, CNS, BM, portions of spleen TERM 2
Lymphatic Vessels
DEFINITION 2 Structurally similar to veins & venules1-way internal valvesSuperficial lymphatic _______ travel with superficial veins & drain lymph from: hypodermis (subcutaneous tissue), mucous membrane (nasal & oral cavity), parietal layer of serous membranes (pleura, pericardium & peritoneum)Deep lymphatic ________ travel with deep veins & arteries & drain lymph from: skeletal muscles and other organs of head, neck, limbs & trunk & visceral organs in thoracic & abdominopelvic cavities TERM 3
Lymphatic Trunks
DEFINITION 3 Contains 1 way valvesMain lymphatic ________: R & L subclavian, R & L jugular, R & L bronchomediastinal, R & L lumbar, and intestinal lymphatic ________ TERM 4
L & R Subclavian Lymphatic
Trunks
DEFINITION 4 1 of 5 lymphatic trunksDrain lymph from upper limbs & portions of thorax & upper back TERM 5
L & R Jugular Lymphatic
Trunks
DEFINITION 5 1 of 5 lymphatic trunksDrain lymph from head & neck
L & R Bronchomediastinal Lymphatic
Trunks
1 of 5 lymphatic trunksDrain lymph from thoracic viscera TERM 7
L & R Lumbar Lymphatic
Trunks
DEFINITION 7 1 of 5 lymphatic trunksDrain lymph from abdominopelvic cavity wall, distal colon & rectum, reproductive viscera, & LL TERM 8
Intestinal Lymphatic Trunk
DEFINITION 8 1 of 5 lymphatic trunks ; only 1Drains lymph from abdominal viscera (stomach through distal colon) TERM 9
Lymphatic Ducts
DEFINITION 9 Contain 1 way valves to help keep lymph moving toward the heratCollect lymph from lymphatic trunks in order to return it to venous sytem2 types: right one & thoracic TERM 10
Right Lymphatic Duct
DEFINITION 10 Very shortReceives lymph from structures superior to diaphragm on right side of body onlyReceives lymph from R subclavian, R jugular & R bronchomediastinal trunksEmpties into venous circulation at junction of R internal jugular & R subclavian veins (R venous angle)
Spleen White Pulp Functions
Activation of lymphocytes by antigens - initiates immune responsePhagocytosis of antigens by MQ TERM 17
Spleen Red Pulp Functions
DEFINITION 17 Blood reconditioning functions: removal of damaged & worn out RBCs & platelets via phagocytosisStorage reservoir of platelets & RBCsHemopoiesis under certain conditions TERM 18
Lymphatic Nodules
DEFINITION 18 MALT: dense collectinos of lymphocytes found within the mucous membranes (mucosa) of GI, respiratory, urinary & reproductive tractsPeyer's patches, vermiform appendix, tonsils (pharyngeal, palatine & lingual) TERM 19
Peyer's Patches
DEFINITION 19 Of MALTFound in the ileum of SI of digestive systemMALT in distal SI wall TERM 20
Pharyngeal Tonsils
DEFINITION 20 MALT of posterior nasal pharynxOnly 1, not bilateralJust above uvulaLocated in nasopharynxAdenoids
Palatine Tonsils
MALT of posterior lateral oral cavity wallPairedConsidered "the tonsils"Tonsilitis TERM 22
Lingual Tonsils
DEFINITION 22 MALT of posterior tongueBilateral
