SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.Figure 20.1Using Figure 20.1, match the following:1)Axillary node(s).1)2)Cisterna chyli.2)3)Entrance of thoracic duct into subclavian vein.3)4)Thoracic duct.4)5)Lymphatic collecting vessels.5)1Figure 20.2Using Figure 20.2, match the following:6)Efferent vessels.6)7)Cortex.7)8)Medullary cord.8)9)Trabecula.9)10)Medulla.10)MATCHING. Choose the item in column 2 that best matches each item in column 1.Match the following:11)Protein-containing fluid withinlymphatic vessels.12)Stores blood platelets.13)Receives lymph from most of thebody.A)SpleenB)Thoracic ductC)Lymph11)12)13)214)Small organs intimately associatedwith lymphatic vessels.15)Largest lymphatic organ.16)Isolated clusters of lymph folliclesfound in the wall of the smallintestine.A)Lymph nodesB)SpleenC)Peyer's patches14)15)16)TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false.17)Peyer's patches are clusters of lymphoid tissue found primarily in the large intestine.17)18)The lymphatic capillaries function to absorb the excess protein-containing interstitial fluid andreturn it to the bloodstream.18)19)Lymph always flows away from the heart.19)20)Lymphatic capillaries are permeable to proteins.20)21)Digested fats are absorbed from the intestine by the lymph capillaries.21)22)Chyle is delivered to the blood via the lymphatic system.22)23)All lymphoid organs develop from mesoderm.23)24)About 3 liters of fluid are lost to the tissue spaces every 24 hours and are returned to thebloodstream as lymph.24)25)Because lymph vessels are very low-pressure conduits, movements of adjacent tissues areimportant in propelling lymph through the lymphatics.25)26)Lymphoid tissue is mainly reticular connective tissue.26)27)Lymphocytes reside temporarily in lymphoid tissue, then move to other parts of the body.27)28)All the lymphoid organs are well developed before birth.28)29)An infected lymph gland is called a bubo.29)30)When tissues are inflamed, lymphatic capillaries develop openings that permit uptake of largeparticles such as cell debris, pathogens, and cancer cells.30)31)The cisterna chyli collects lymph from the lumbar trunks draining the upper limbs and from theintestinal trunk draining the digestive organs.31)32)If even a small part of the spleen is left in a ten-year-old child, it will most likely regenerate itself.32)333)All lymphatic organs are composed of epithelial tissue.33)34)The most important role of the spleen is to provide a site for lymphocyte proliferation and immunesurveillance and response.34)35)The simplest lymphoid organs are the lymph nodes.35)MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.36)Small organs associated with lymphatic vessels are termed ________.A)axillary nodesB)lymph folliclesC)cisterna chyliD)lymph nodes36)37)Which of the following would not be classified as a lymphatic structure?A)pancreasB)Peyer's patches of the intestineC)spleenD)tonsils37)38)The distal portion of the small intestine contains clumps of lymph follicles called ________.A)islets of LangerhansB)rugaeC)Peyer's patchesD)villi38)39)Both lymph and venous blood flow are heavily dependent on ________.A)two-way valvesB)skeletal muscle contractions and differences in thoracic pressures due to respiratorymovementC)the pumping action of the heartD)contraction of the vessels themselves39)40)The thymus is most active during ________.A)old ageB)childhoodC)fetal developmentD)middle age40)41)Which lymphatic structure drains lymph from the right upper limb and the right side of the headand thorax?A)right lymphatic ductB)lumbar trunkC)cisterna chyliD)thoracic duct41)42)What effect does age have on the size of the thymus?A)The size of the thymus increases continuously from birth to death.B)The thymus is not affected by age.C)The thymus initially increases in size and then decreases in size from adolescence through oldage.D)The size of the thymus decreases continuously from birth to death.42)43)The lymphatic capillaries are ________.A)more permeable than blood capillariesB)as permeable as blood capillariesC)less permeable than blood capillariesD)completely impermeable43)44)Antibodies that act against a particular foreign substance are released by ________.A)T lymphocytesB)medullary cordsC)lymph nodesD)plasma cells44)445)Lymph leaves a lymph node via ________.A)the subscapular sinusB)afferent lymphatic vesselsC)efferent lymphatic vesselsD)the cortical sinus45)46)Which cells become immunocompetent due to thymic hormones?A)lymphocytesB)basophilsC)monocytesD)macrophages46)47)Functions of the spleen include all of those below except ________.A)storage of blood plateletsB)forming crypts that trap bacteriaC)storage of ironD)removal of old or defective blood cells from the blood47)48)When the lymphatic structures are blocked due to tumors, the result is ________.A)increased pressure in the lymphatics proximal to the blockageB)shrinkage of tissues distal to the blockage due to inadequate delivery of lymphC)abnormally high lymph drainage from the distal regionD)severe localized edema distal to the blockage48)49)Select the correct statement about lymph transport.A)Under normal conditions, lymph vessels are very high-pressure conduits.B)Lymph transport is faster than that occurring in veins.C)Lymph transport depends on the movement of adjacent tissues, such as skeletal muscles.D)Lymph transport is only necessary when illness causes tissue swelling.49)50)Select the correct statement about lymphocytes.A)T cells are the only form of lymphocyte found in lymphoid tissue.B)T cells are the precursors of B cells.C)The two main types are T cells and macrophages.D)B cells produce plasma cells, which secrete antibodies into the blood.50)51)Select the correct statement about lymphoid tissue.A)Once a lymphocyte enters the lymphoid tissue, it resides there permanently.B)Lymphoid macrophages secrete antibodies into the blood.C)T lymphocytes act by ingesting foreign substances.D)Lymphoid tissue is predominantly reticular connective tissue.51)52)Lymphoid tissue that appears as a swelling of the mucosa in the oral cavity is called a(n) ________.A)Peyer's patchB)thymusC)appendixD)tonsil52)53)Which of the following is not a mucosa-associated lymphatic tissue?A)tonsilB)Peyer's patchC)thymusD)appendix53)54)Peyer's patches are found in the ________.A)duodenum of the small intestineB)large intestineC)ileum of