Multiple Choice
The lymphatic ___________ return fluid to the cardiovascular system, the lymphoid organs primarily aid __________ function, and ___________ absorb fats that are too large to fit into capillaries.
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20. The Lymphatic System
Introduction to the Lymphatic System
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Lymph is moved through lymph vessels by which of the following mechanisms?
A
Active transport by lymphocytes
B
Contraction of nearby skeletal muscles
C
Peristaltic movement of lymph vessels
D
Pumping action of the heart
Verified step by step guidance1
Understand that lymph is a fluid that circulates through the lymphatic system, which is part of the immune system.
Recognize that unlike blood, lymph is not pumped by the heart. Instead, it relies on other mechanisms to move through the lymphatic vessels.
Identify that one of the primary mechanisms for moving lymph is the contraction of nearby skeletal muscles. This is similar to how blood is moved through veins.
Consider the role of valves in lymphatic vessels, which prevent backflow and ensure that lymph moves in one direction towards the heart.
Note that while peristaltic movement is a mechanism used in other systems (like the digestive system), it is not a primary mechanism for lymph movement.
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