Med Term Ch 6

functions of the lymphatic system

small fingerlike projections found in the small intestines, contain blood vessels and lacteals

major structures of the lymphatic sys

protect body against invading microorganisms and diseases

transport lymph from tissues thru out the body and eventually returns this fluid to venous circulation

clear fluid, transports waste and proteins out of spaces between the cells

transports food, oxygen and hormones to cells, "tissue fluid"

opens briefly to allow lymph to enter capillary, the action of cells closing causes lymph to move forward

have valves to prevent backward flow of lymph

collects lymph from R side of head, neck, RUQ of body and arms

largest lymphatic vessel in the body, collects lymph from L side of head, neck, LUQ of trunk, L arm, trunk and both legs

lymphocytes capable of destroying pathogens

3 major lymph node areas

3 masses of lymphoid tissue that form a protective ring around back of nose and throat

nasopharyngeal tonsils

L & R sides of throat

base of tongue

located superior to the heart, assists immune system

located in the walls of ileum

lower portion in cecum

located in LUQ, filters microorganisms and other foreign materials from the blood, destroys worn out RBS and releasing their hemoglobin for reuse

lymphadenitis

disease process affecting lymph node or nodes

benign tumor formed by abnormal collection of lymphatic tissues due to congenital malformation

functions of immune system

wraps body in physical barrier

traps breathed in foreign matter with nose hairs and mucous membranes

used acids and enzymes produced by the stomach to destroy invaders

WBCs work together to attack and destroy pathogens lymphatic

substance that the body regards as being foreign

substances that produces