Question

why humans cannot eat grass

Answer 1

humans cannot eat grass because the chemical which is required to digest the grass is not predent in the body of the humans .

Answer 2

Human stomachs cannot digest hard raw leaves and grass easily, but cows can.certainly eat grass. Unlike humans, cows are ruminants and have four stomach chambers enabling them to digest grass.Humans aren't the only creatures who have difficulty digesting grass – dogs sometimeseat grass when they are feeling nauseous