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The Lymphatic System and the Cardiovascular System Are Closely Related Structures That Are Joined by a Capillary System

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The lymphatic system and the cardiovascular system are closely related structures that are joined by a capillary system. The lymphatic vessels are present wherever there are blood vessels and transport excess fluid to the end vessels without the assistance of any "pumping" action. The lymphatic system is composed of lymph vessels, lymph nodes, and organs. Lymphatic System What makes up the lymphatic system? A) Lymph nodes B) Lymphatic vessels C) Lymph organs D) All of the above E) None of the above Importance in Human Body It is important to the body's defense mechanisms. It filters out organisms that cause disease, produces certain white blood cells and generates antibodies. It absorbs fats from the small intestine. It is also important for the distribution of lymph fluids and nutrients in the body, because it drains excess fluids and protein so that tissues do not swell up. Importance in Human Body Which of the following functions does the lymphatic system not do in the human body? A) Circulate lymph fluid B) Fights diseases caused by organisms C) Picks up fat from small intestine D) Circulates blood E) Produces white blood cells What is the fluid in the lymphatic system? “Lymph" is a milky body fluid that contains a type of white blood cells, called "lymphocytes," along with proteins and fats. Lymph seeps outside the blood vessels into spaces of the body tissues; this is stored in the "lymphatic" system to flow back into the bloodstream. Through the flow of blood in and out of arteries, and into the veins, and through the lymph nodes and into the lymph, the body is able to eliminate the products of cellular breakdown and bacterial invasion. What is the fluid in the lymphatic system? It is made up of all the following except, A) Protein B) Red Blood cells C) Lymphocytes D) Fats E) Water How does the lymph fluid go into the cardiovascular system that makes up the circulatory system? Two very large areas of significance in this system are the right lymphatic duct which drains lymph fluid from the upper right quarter of the body above the diaphragm and down the midline, and the thoracic duct, a structure roughly sixteen inches long located in the pleural cavity which drains the rest of the body. These ducts bring the lymph fluid back to the cardiovascular system through the right subclavian vein and the left subclavian vein. How does the lymph fluid go into the cardiovascular system that makes up the circulatory system? A) Lymph node B) Right lymphatic duct and the Thoracic duct C) Lymphatic vessel D) Jugular vein E) Lymphatic trunk Lymph organs Lymph organs include the bone marrow, lymph nodes, spleen, and thymus. Lymph organs Which of the following is not an lymph organ? A) Heart B) Lymph node C) Bone marrow D) Spleen E) Thymus Bone marrow-contains tissue that produces lymphocytes. B-lymphocytes (B-cells) mature in the bone marrow. T-lymphocytes (T-cells) mature in the thymus gland. Other blood cells such as monocytes and leukocytes are produced in the bone marrow. Where are T cells and B cells produced? A) Bone marrow B) Blood C) Blood vessels D) Lymph vessels E) Thyroid Lymph nodes-are areas of concentrated lymphocytes and macrophages along the lymphatic veins. There are more than 100 tiny, oval structures (called lymph nodes). These are mainly in the neck, groin and armpits, but are scattered all along the lymph vessels. What are lymph nodes? A) Concentrated areas of lymphocytes B) Blood vessels C) Lymph fluids D) Proteins E) Red blood cells Spleen-is similar to the lymph node except that it is larger and filled with blood. The spleen serves as a reservoir for blood, and filters or purifies the blood and lymph fluid that flows through it. If the spleen is damaged or removed, the individual is more susceptible to infections. What does the spleen do? A) It filters blood and lymph fluid B) It makes B cells and T cells C) It makes red blood cells D) It makes protein E) It makes water Thymus-secretes a hormone, thymosin, that causes pre- T-cells to mature (in the thymus) into T-cells. What is the function of the thymus gland? A) It makes B cells B) It matures T cells C) It secretes protein D) It makes red blood cells E) It makes platelets .
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