Question

All vertebrates digest food as it passes through a one-way tube called a digestive_____ , which often has specialized structures.

Answer 1

alimentary canal

Step-by-step explanation:

food goes in through the mouth and comes out through the anus.(i.e.having a mouth at one end and anus at the other end.

Note:a two ways tube is when food goes through the mouth and comes out through the mouth.