A&P Chapter 20 The Lymphatic System

25 July 2022
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Protein-containing fluid within lymphatic vessels.
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Lymph
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Stores blood platelets.
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Spleen
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Receives lymph from most of the body.
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Thoracic duct
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Small organs intimately associated with lymphatic vessels.
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Lymph nodes
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Largest lymphatic organ.
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Spleen
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Isolated clusters of lymph follicles found in the wall of the small intestine.
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Peyer's patches
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Peyer's patches are clusters of lymphoid tissue found primarily in the large intestine.
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FALSE
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The lymphatic capillaries function to absorb the excess protein-containing interstitial fluid and return it to the bloodstream.
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TRUE
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Lymph always flows away from the heart.
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FALSE
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Lymphatic capillaries are permeable to proteins.
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TRUE
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Digested fats are absorbed from the intestine by the lymph capillaries.
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TRUE
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Chyle is delivered to the blood via the lymphatic system.
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TRUE
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All lymphoid organs develop from mesoderm.
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FALSE
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About 3 liters of fluid are lost to the tissue spaces every 24 hours and are returned to the bloodstream as lymph.
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TRUE
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Because lymph vessels are very low-pressure conduits, movements of adjacent tissues are important in propelling lymph through the lymphatics.
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TRUE
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Lymphoid tissue is mainly reticular connective tissue.
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TRUE
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Lymphocytes reside temporarily in lymphoid tissue, then move to other parts of the body.
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TRUE
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All the lymphoid organs are well developed before birth.
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FALSE
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An infected lymph gland is called a bubo
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TRUE
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When tissues are inflamed, lymphatic capillaries develop openings that permit uptake of large particles such as cell debris, pathogens, and cancer cells.
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TRUE
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The cisterna chyli collects lymph from the lumbar trunks draining the upper limbs and from the intestinal trunk draining the digestive organs
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FALSE
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If even a small part of the spleen is left in a ten-year-old child, it will most likely regenerate itself.
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TRUE
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All lymphatic organs are composed of epithelial tissue.
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FALSE
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The most important role of the spleen is to provide a site for lymphocyte proliferation and immune surveillance and response.
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FALSE
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The simplest lymphoid organs are the lymph nodes.
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FALSE
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Small organs associated with lymphatic vessels are termed ________.
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lymph nodes
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Which of the following would not be classified as a lymphatic structure?
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pancreas
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The distal portion of the small intestine contains clumps of lymph follicles called ________.
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Peyer's patches
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Both lymph and venous blood flow are heavily dependent on ________.
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skeletal muscle contractions and differences in thoracic pressures due to respiratory movement
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The thymus is most active during ________.
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childhood
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Which lymphatic structure drains lymph from the right upper limb and the right side of the head and thorax?
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right lymphatic duct
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What effect does age have on the size of the thymus?
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The thymus initially increases in size and then decreases in size from adolescence through old age.
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The lymphatic capillaries are ________.
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more permeable than blood capillaries
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Antibodies that act against a particular foreign substance are released by ________.
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plasma cells
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Lymph leaves a lymph node via ________.
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efferent lymphatic vessels
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Which cells become immunocompetent due to thymic hormones?
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lymphocytes
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Functions of the spleen include all of those below except ________.
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forming crypts that trap bacteria
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When the lymphatic structures are blocked due to tumors, the result is ________.
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severe localized edema distal to the blockage
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Select the correct statement about lymph transport.
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Lymph transport depends on the movement of adjacent tissues, such as skeletal muscles.
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Select the correct statement about lymphocytes.
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B cells produce plasma cells, which secrete antibodies into the blood.
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Select the correct statement about lymphoid tissue.
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Lymphoid tissue is predominantly reticular connective tissue.
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Lymphoid tissue that appears as a swelling of the mucosa in the oral cavity is called a(n) ________.
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tonsil
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Which of the following is not a mucosa-associated lymphatic tissue?
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thymus
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Peyer's patches are found in the ________.
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ileum of the small intestine
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Lymph capillaries are absent in all but which of the following?
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digestive organs
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What is a bubo?
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an infected lymph node
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The thymus is the only lymphoid organ that does not:
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directly fight antigens
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Large clusters of lymph nodes occur in all of the following locations except the ________.
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lower extremities
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Digestive tract-associated lymphatic tissue includes all of the following except ________.
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islets of Langerhans
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Which of the following is not a method that maintains lymph flow?
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smooth muscle contraction
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The tonsils located at the base of the tongue are the ________.
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lingual tonsils
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Which of the following is not a normal component of lymph?
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red blood cells
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A sentinel node is ________.
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the first node to receive lymph from an area suspected to be cancerous
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Which of the following are functions of lymphoid tissue?
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house and provide a proliferation site for lymphocytes; furnish an ideal surveillance vantage point for lymphocytes and macrophages
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Which of the following is not a function of the lymphatic system?
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transporting respiratory gases
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Which of the following is not a function of lymph nodes?
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produce lymph fluid and cerebro-spinal fluid