The value of cereals and vegetables.

Grains and vegetables are very important in nature. They serve as the main food source for many animals. Man also depends on these plants. We need plant food, but we cannot eat grass and leaves, since our digestive system digests plant cells worse than animals, and grains and vegetables break down rather quickly and provide us with many necessary organic substances, although we need to remember about proper nutrition, so how one cannot eat only one kind of plant.