What prevents lymph from flowing backwards in the lymph vessels?
valves
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20
What is Humoral immunity?
Acquired immunity provided by antibodies in in the blood plasma.
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20
Identify h and c, and give their function.
h. reticular fibers- a net of connective tissue. support, c. germinal center â mitosis of lymphocytes can take place in response to a foreign invader.
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15
What is cell mediated immunity?
Immunity that comes from the action of T-lymphocytes
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15
What function do the skeletal muscles play in the lymphatic system?
Skeletal muscles pump lymph through the lymph vessels. The valves prevent back flow
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What is acquired immunity?
An immune response targeted at a specific pathogen or toxin
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What is the difference between Plasma B cells and memory B cells?
Plasma B cells produce and release antibodies, whereas Memory B cells remember the infection so they can respond quicker the next time
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What are the three functions of the spleen?
1. Cleanse the blood of foreign invaders, 2. To dispose of worn out erythrocytes, 3, to be a reservoir of oxygen rich blood.
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What is complement??
It is a first line of defense. series of 30 proteins that are activated by foreign invaders. they lyse bacteria, phagocytosis and inflamation
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What do natural killer cells do?
Lymphocytes that attack tumor cells and virus infected cells
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How much of the interstitial fluid is diffused back into the capillaries?
90%
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Identify d and e, and give their functions.
d. lymph nodule â lymph tissue arranged in compact spherical structures without a capsule, e. capsule â dense connective tissue encapsulating the lymph node