Do Humans Chew Cud?
Animals like cows, goats which ruminates the foods have entirely different digestive system than ours. We eat soft food and our digestives system is designed to digest that type of food only. But these animals eat food containing cellulose, hemicellulose which is very hard to digest. Their digestive system has a sac like structure called Rumen after food pipe and after that Reticulum which also resembles a bag. These animals eat their food fast and that food gets stored in this bag like structures get mixed with the digestive enzymes there. When the animal sits and brings this mixture into mouth chews it properly and swallows to get it digested completely.