Yes, most mammals have 1 way digive systems.
a. an earthworm
Yes.
Oysters have a two way digestive system. This means that they only have on opening for both food to go in and to come out.
They have complete digestive system.
Planarians are classified underneath the flatworm phyla, and flatworms have two way digestive systems.
No bats have a one way digestive system. Food goes in the mouth, is digested, and comes out the other end. In two way digestive systems food is taken in and waste is excreted through the same opening.
I am not 100 % sure of this but I believe the digestive system goes from your mouth all the way to your colon so everything in between is a part of the digestive system.
One way. An earth worm has both a mouth and anus.
Eating their own faeces is a way to give the hamster's digestive system a second go at digesting the plant matter it eats. Plant cells have a strong cell wall, which is tough to digest, which is why hamsters and rabbits will eat their faeces.
Yes, the respiratory system provides oxygen to the digestive system.
one way digestive system is like the human body, like a conveyor belt, the food goes into the mouth the stomach digests it and then exits the anus. two way digestive system is when a mouth eats the food, it gets digested and gets expelled through the same opening (mouth) (imagine barfing your own poo, yuck!)
It is part of the digestive system. The digestive system goes from the mouth all the way to the anus.