Sagot :
Answer:
The alimentary canal, shown in Figure 1b, is a more advanced system: it consists of one tube with a mouth at one end and an anus at the other. Earthworms are an example of an animal with an alimentary canal.
Explanation:
sana po tama
Answer:
Tubular systems. Most animals above the level of cnidarians and flatworms have a complete digestive, a tube with two openings a mouth and an anus.