WAEC - Biology (1996 - No. 14)
Which of the following statements about the lymphatic system is not correct?
The lymph vessels are always larger in size than the arteries
The flow of lymph is assisted by general muscular movement
Lymph flows only in one direction due to the presence of valves
Lymph is emptied into the blood circulatory system through a vein
Lymph node becomes swollen during serious infections