Lymphatic System and Immunity Pathways, Cells, and Responses Exam questions and answers

Lymphatic System and Immunity Pathways, Cells, and Responses Exam questions and answers What is the lymphatic system? - A collection of cells and biochemicals that travel in lymphatic vessels, closely associated with the cardiovascular system. What are the three main functions of the lymphatic system? - 1) Transports excess interstitial fluid to the bloodstream, 2) Absorbs lipids from the digestive system, 3) Defends the body against diseases. What does the term 'immune system' refer to in the context of the lymphatic system? - It refers to the cells of the lymphatic system that provide defense against disease and permanent immunity against future infections. What is the pathway of lymphatic fluid? - Lymphatic capillaries → lymphatic vessels → lymph nodes → larger lymphatic vessels → lymphatic trunks → lymphatic collecting ducts → subclavian veins. What are lymphatic capillaries? - Microscopic, closed-ended tubes that are thin-walled and formed from simple squamous epithelium, allowing tissue fluid to enter and become lymph. How do lymphatic vessels differ from veins? - semilunar valves that allow one-way flow. What are lymphatic trunks and their function? - vessels and are named for the regions they serve. What is the thoracic duct? - Lymphatic vessels have thinner walls and contain