Question

Explain why a cow can digest grass but we cannot.​

Answer 1

Cows can not digest grass. It's the bacteria that lives in the stomach of cows that help them to digest it. ... This is one of the reason why plant eating animals have large stomachs and intestines. If humans can support the microbes found in the cows stomach, then humans can also derive nutrients from grass.

Answer 2

This compartment's basic purpose is to ferment the nutrients out of the food. Cattle are herbivores, which means they only eat plants. As a general rule, the nutrients in plants are harder to digest than the nutrients in animal proteins, partially because they are locked in cellulosic cell walls.