Which statement about the lymphatic system is true?

• A. It Relies on Muscle Movement to Circulate Lymph
• B. It Circulates Oxygen to Cells
• C. It Parallels Major Arteries
• D. It Forms Plasma

Answer: (A)

The movement of lymph depends on skeletal muscle contractions and body movement, with valves helping to prevent backflow. The lymphatic system has no central pump like the heart, so lymph is propelled mainly by surrounding muscles and changes in pressure during movement and breathing. This is what makes the statement true. Oxygen circulation is a function of the blood circulatory system, not lymph. The lymphatic system forms a separate network that collects interstitial fluid, not plasma, which is the liquid component of blood. So the best answer is that lymph circulation relies on muscle movement to move lymph through the vessels.