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The Reason Why Humans Can’t Eat Grass but Cows Can

Author: Jessica Zhang

Editors: Yanxi Chen and He-Hanson Xuan

Artist: Cici Zhang

Humans cannot digest cellulose, a main component of forage, so we cannot survive solely by consuming grass. Cows not only utilize cellulose as their primary source of energy but also produce dairy products.

Cows only have one stomach, but it is divided into four compartments: the rumen, reticulum, omasum, and a