Human beings do not have a chambered-stomach like cows. Why do we lack the process of rumination, explain
@ Nidhi is correct...just adding one more point the 4 chambered stomach helps in digesting cellulose present in their food by rumination. In case of human we are omnivores and not totally dependent on green leaves etc for our food, so need of digesting cellulose is less compared to herbivores animals like cow deer etc. That is why, we don't possess chambered stomach.