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 really think this is C. Uses valves to prevent backward flow
Jackie, Penny, Linda, or whoever --
1. Go to http://www.google.com
2. Type in flow of lymph blood system (or whatever search terms you need).
3. Press the Enter key.
4. Read different search results until you find what you need.
5. Re-search with different search terms if you don't find all you need.
You are correct that the answer is C. The lymphatic system uses valves to prevent backward flow. Now, let me explain how we can arrive at this conclusion by comparing the flow of lymph in the lymphatic system with the flow of blood in the circulatory system.
To understand the similarities and differences between the lymphatic system and the circulatory system, let's focus on the flow of fluid within each system.
In the circulatory system, blood is pumped by the heart and travels in a closed circuit. The heart acts as a pump, continuously propelling the blood through a network of blood vessels, including arteries, capillaries, and veins. The blood is constantly in motion, flowing from the heart to the body tissues and back to the heart.
In the lymphatic system, on the other hand, lymph is a clear fluid that flows through lymphatic vessels. Lymph is derived from interstitial fluid, which is the fluid that surrounds the body cells. Unlike blood, lymph does not have a central pumping organ like the heart. Instead, the movement of lymph is facilitated by a combination of factors, primarily muscle contractions and rhythmic movements of the body.
Now, let's compare the options given:
A. Uses a pump: The lymphatic system does not have a central pump like the heart in the circulatory system, so this option is not correct.
B. Contains fluid that travels in only one direction: This option is partially correct. Similar to the circulatory system, lymph flows predominantly in one direction, from peripheral tissues towards the heart. However, there can be some backflow if the valves within the lymphatic vessels fail to prevent it.
C. Uses valves to prevent backward flow: This option is correct. Valves are present within the lymphatic vessels and function to prevent backward flow of lymph. These valves ensure that the flow of lymph is unidirectional, helping it to move towards the heart.
D. Contains fluid that travels in a closed circuit: The lymphatic system does not have a closed circuit like the circulatory system. Lymph flows through a network of vessels and eventually drains back into the circulatory system, but it is not a continuous closed loop.
Therefore, the correct answer is C. The lymphatic system uses valves to prevent backward flow, ensuring the unidirectional flow of lymph.