BIOD 152 Exam 5
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BIOD 152 Exam 5
- The lymphatic system is closely connected with what other body system?-
Answer: Cardiovascular system
- What are the lymphatic vessels?
Answer: The lymphatic vessels take up excess tissue fluid and return it to the bloodstream
- What are three functions of the lymphatic system?
Answer:
- The lymphatic vessels take up excess tissue fluid and return it to the bloodstream
- Lymphatic capillaries absorb fats and transport them to the bloodstream.
- The lymphatic system helps with immunity to defend the body against diseases
- What is lymph?
Answer: Excess tissue fluid entering the lymphatic capillaries from the interstitial fluid not returned by the cardiovascular system
- Describe the flow of lymph
Answer: The lymph flows one way, from lymphatic capillary system to subclavian veins, where it joins the venous circulation to return to the heart
6. True or false: Lymph vessels are only found in the lower extremities
Answer: False
- Describe the structure of lymph vessels
Answer: Lymph vessels have one-way flow valves similar in structure to the large veins of the cardiovascular system. The valves prevent the backward flow of lymph. The return of the lymph fluid into circulation is solely dependent on the squeezing action of skeletal muscles, squeezing the fluid one way through the lymphatic vessels.
- The right lymphatic duct drains into the
Answer: Right subclavian vein
9. True or False: The thoracic duct drains fluid from the right arm
Answer: False- The left arm
- Describe the structure of a lymph node
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Answer: A lymph node is encapsulated in a fibrous connective tissue with many incoming and fewer outgoing lymphatic vessels. Incoming vessels (afferent vessels) flow through a network of sinuses that contain cells. The lymph then flows out of the lymph node through the efferent vessel. The interior of the lymph node is divided into open spaces called nodules, containing lymphocytes and macrophages.