When comparing the flow of lymph in the lymphatic system with the flow of blood in
the circulatory system, it can be said that the lymphatic system also
A. uses a pump.
B. contains fluid that travels in only one direction.
C. uses valves to prevent backward flow.
D. contains fluid that travels in a
closed circuit.
I think the answer is (B) not sure
Thanks everyone
YW!!
To determine the correct answer, we will compare the flow of lymph in the lymphatic system with the flow of blood in the circulatory system.
The circulatory system, which includes the cardiovascular system, consists of the heart, blood vessels, and blood. The heart acts as a pump, actively pushing blood throughout the body. The blood travels in a closed circuit, meaning it continuously moves through the arteries, capillaries, and veins, always returning to the heart. The circulatory system also uses valves to prevent any backward flow of blood.
Now, let's consider the lymphatic system. The lymphatic system consists of lymphatic vessels, lymph nodes, and lymph fluid. Lymph fluid is a clear, colorless fluid that contains white blood cells, proteins, and waste materials. Unlike blood, which is circulated by the heart's pump, lymph fluid does not have a central pump.
However, the lymphatic system does utilize a system of skeletal muscle contractions and breathing movements to propel lymph fluid forward. Skeletal muscle contractions, such as those occurring during physical activity, help squeeze the lymph vessels and move lymph fluid along. Breathing movements also create pressure changes in the thoracic (chest) cavity, assisting in lymph flow.
Regarding the direction of lymph fluid flow, it generally moves in one direction, away from the tissues and towards the heart. This is due to the presence of valves within the lymphatic vessels. These valves allow for the forward flow of lymph, preventing any backward or retrograde flow.
Based on this explanation, the correct answer is (B) - the lymphatic system contains fluid that travels in only one direction.