The swallowed food moves downwards in the alimentary canal because of
A. force provided by the muscular tongue
B. the flow of water taken with the food
C. gravitational pull
D. the contraction of muscles in the wall of foodpipe
Answer:D
The swallowed food moves downwards in the alimentary canal because of
A. force provided by the muscular tongue B. the flow of water taken with the food C. gravitational pull D. the contraction of muscles in the wall of foodpipe