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10 Cards in this Set
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- Back
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What are the primary lymphatic organs?
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red bone marrow and the thymus gland
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In a child most bones have red bone marrow, but in an adult, what is it limited to?
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sternum
vertebrae ribs pelvic girdle upper ends of long bones in the arms and legs |
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In addition to RBC's, bone marrow produces the various types of white blood cells, what are they?
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BEN basophils, eosinophils, neutrophils and lymphocytes
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What type of lymphocytes are made in the bone marrow?
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B cell lymphocytes (mature in bone marrow) and T cell lymphocytes (mature in the thymus)
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What ensures that B cells do not harm the body?
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Any B cell that reacts with cells of the body (self-reactive B cell) is removed in the bone marrow and does not enter the circulation.
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Where are self-reactive T-cells destroyed?
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Thymus
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What are the 2 functions of the thymus?
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The thymus gland produces thymosin (thymic hormones), which is thought to aid in the maturation of T cell lymphocytes
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What is thought to aid in the maturation of T cell lymphocytes?
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Thymosin a thymic hormone and endocrine gland
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What is the path an immature T cell lymphocyte would take to get into the thymus from the bone marrow, how many ever leave the thymus? Why is this critical?
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through the blood stream, 5%, it tests to se if any are self-reactive, they die. If they have potential to attack a pathogen, they survive and leave the thymus
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Why is the thymus critical?
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W/o mature T cells, the body's response to certain pathogens is poor or absent
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