Question

The movement of lymph within lymphatic vessels is dependent upon _____.

• A. Residual blood pressure forcing the plasma through the blood vessels.
• B. Suction from the contracting lymph nodes.
• C. Amoeboid movement of the cellular component of the lymph, primarily the T-cells that "travel".
• D. Skeletal muscle contraction, peristalsis of muscles around lymphatic vessels and the action of one-way valves.

Answer 1

The correct option is D

Skeletal muscle contraction, peristalsis of muscles around lymphatic vessels and the action of one-way valves.

Unlike the circulatory system, that has the heart to pump blood through the system, the lymphatic system does not have a pump. The Lymph is moved through the lymphatic vessels by contractions of the lymphatic vessels and the movement of the surrounding digestive system and skeletal muscles. Also the one-way action of valves within the lymphatic capillaries, help in its motion or circulation.