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Module 11 A&P

Lymphatic System

lymphatic system consist of lymphatic vessels, lymphatic tissue, and lymphatic organs
lymphatic carry fluid... away from the tissues
the tissues and organs of the lymphatic system produce... immune cells
functions of the lymphatic system maintenance of fluid balance, absorption of fats, immunity
maintenance of fluid balance lymph fluid is formed from tissue fluid left behind after the capillary exchange, absorbs fluid not reabsorbed and returns to the bloodstream
absorption of fats specializes lymphatic vessels in the small intestines absorb fats and fat soluble vitamins
immunity lymph nodes and other lymphatic organs filter lymph to remove microorganisms and foreign particles
lymph and plasma are different because of... protein content
lymphatic vessels have thin walls and valves... to prevent back flow, enduring that lymph moves steadily away from the tissues and towards the heart
fluid moves passively, aided primarily by.... rhythmic contractions of lymphatic vessels
flow is aided by.... contraction of skeletal muscles
respiration causes.... changes that help propel lymph from abdominal to thoracic cavity
right lymph drains.... upper right quadrant into right subclavian vein
the thoracic drains lymph from.... rest of the body into the left subclavian vein
two types of lymphatic organs primary and secondary
primary lymphatic organs red bone marrow, thymus; provide a location for B and T lymphocytes to mature
Secondary lymphatic organs lymph nodes, tonsils, spleen
peyer's patches lymphatic nodules in the small intestine
lysozymes found in mucous, tears, and saliva
germinal centers form and release lymphocytes.... when infection is present
function of lymph node remove pathogens from lymph
cancer can spread through the lymphatic system... when a person has breast cancer the physician will check the axillary lymph nodes
single pharyngeal tonsil sits on the wall of the pharynx, just behind the nasal cavity
spleen the body's largest lymphatic organ
spleen resides in the..... upper left quadrant of abdomen
spleen function immunity, destruction of old RBC, blood storage
immunity function screen blood for foreign antigens; ingest and destroy and microorganisms
destruction of old RBC function digest worn out RBC and imperfect platelets, recycle hemoglobin
blood storage function helps stabilize blood volume by rapidly adding blood back into general circulation, stores 20-30% body platelets
three lines of defense external barriers, nonspecific immunity, specific immunity
external barriers skin and mucous membranes, produce muscous that traps pathogens
phagocytosis most important phagocytes: Neutrophils and macrophages
natural killer cells group of lymphocytes that seek out and destroy foreign cells, roam the body, unique group of lymphocytes
inflammation stimulates body defense to start fighting infection while instigating measures to contain the pathogen
fever elevation of body temp, promotes the activity of interferon, inhibits the reproduction of viruses and bacteria
antimicrobial proteins interferon and complement
phagocytes cells that ingest and destroy microorganisms and other small particles
most important phagocytes are... neutrophils and macrophages neutrophils and macrophages
complement more than 20 different proteins circulate the the bloodstream in an inactive form
a bacteria, or antibodies against the bacteria.... activate the complement
holes are punched in the bacterium... and swells and burst
fever is beneficial.... it promotes the activity of interferon and inhibits the reproduction of bacteria and viruses
pyrexia also know as "fever"
cellular immunity T cells, aims to destroy foreign cells or host cells that have become infected with a pathogen
humoral immunity B cells, focuses on pathogens outside the host cells; it sends out antibodies to "mark" a pathogen for later destruction, Mainly uses B cells
T lymphocytes develop in bone marrow, mature in thymus
B lymphocytes develop in bone marrow; remain there until fully mature
most abundant of all of the immunoglobulins is.... IgG
three classes of T cells cytotoxic T cells, Helper T cells, Memory T cells
Helper T cells secrete chemicals that summon neutophils and natural killer cells
allergic reaction first exposure: body produces IgE
Mast cells release...... Histamine
Anaphylaxis severe, immediate allergic reaction that affects the whole body
active immunity permanent or long lasting
natural active immunity body produces the virus,( meseals)
Artificial active immunity body makes T cells and antibodies against a disease as a results of a vaccination
passive immunity immunity that only last a few months
natural passive immunity fetus acquires antibodies from mother (breast feeding)
artificial passive immunity obtaining serum from person or animal that has produces antibodies against certain pathogens and then injecting them into someone else
Created by: Kylee_cheyenne



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