Which of the following statements about lymph and lymph vessels is false?
A. Valves inside the lymph vessels direct the flow of lymph in either direction.
B. Lymph returns to the cardiovascular system through a network of open lymph capillaries and vessels that drain the tissues of lymph.
C. Lymph leaves the system of blood vessels through the capillaries due to blood pressure.
D. Lymph vessels eventually drain into one of two collecting ducts, the thoracic duct and the right lymphatic duct.
Answer: A
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