OVERVIEW OF THE IMMUNE SYSTEM
LYMPHATIC AND IMMUNE SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Keep the lymph moving in either direction
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Stop the fluid from moving backward and keep it moving one way
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Separate the blood and the lymph
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There are no valves in the lymphatic vessels
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Detailed explanation-1: -The wall of the lymph capillary is composed of endothelium in which the simple squamous cells overlap to form a simple one-way valve. This arrangement permits fluid to enter the capillary but prevents lymph from leaving the vessel.
Detailed explanation-2: -The lymphatic system contains intraluminal leaflet valves that function to bias lymph flow back towards the heart. These valves are present in the collecting lymphatic vessels, which generally have lymphatic muscle cells and can spontaneously pump fluid.
Detailed explanation-3: -Lymph is transported along the system of vessels by muscle contractions, and valves prevent lymph from flowing backward.
Detailed explanation-4: -Lymph capillaries send lymph into larger tubes called lymphatic vessels. The lymphatic vessels come together in still-larger tubes called collecting ducts. A series of valves keep the fluid moving one way. The collecting ducts empty the lymph into the right or left lymphatic duct (thoracic duct).