Question in the order of lymphatic system.....!!?
A. uses a pump
B. contains fluid that travels within only one direction
C. uses valve to prevent backward flow
D. contains fluid that travels surrounded by a closed circuit
Answers: C.
Lymph does not use a pump other than the pumping commotion of skeletal muscles as they move, nor does it have a closed circuit: lymph vessel are open-ended in tissues. The major lymph vessel in the thorax have valves to prevent the lymph from flowing backwards.
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