Question

food going through the human body digestive system only moved in one direction. However on some animals the food goes in two direction and come out of the same opening. in what animals does this happen? Why? Why would this not work for humans?​

Answer 1

this is known as rumination and it takes place in ruminants like cow .this happens because they are herbivore which mostly eat grass and other plants so for easy digestion the food is mostly chewed by them ..