Most of the people think that empty stomach creates the feeling of hunger , but this is not true. Hunger has nothing to do with an empty stomach. for example, a person who has fever may have a empty stomach, but he does not feel hungry. Similarly when a child is born, he doesn’t not feel hungry for several days.
Do you know why we feel hungry ?
When the blood gets depleted of nutritive materials, a message is sent to our brain by our body through nerves. The deficiency of nutritive materials is caused in the blood by the consumption of energy in the routine work. A sick man remains in a state of rest and consumes small amounts of energy. He, therefore, does not feel hungry for several days.
Whenever there is a deficiency of nutritive food substances in the blood, a message goes to the ‘hunger centre’ of the brain. This centre acts like a brake on the activities of the stomach and intestines. When the blood has sufficient nutritive substance, the hunger centre stops the activities of the stomach and intestines. On the contrary when there is a lack of nutrition the intestines and stomach become active. That is why you can hear your stomach rumbling when you are hungry.
When we feel hungry, we do not demand any particular kind of food. A starved person will eat any kind of food. The main constituents of food are proteins,carbohydrates,facts,mineral,vitamins and water. Each component has specific role to play. Proteins are nitrogenous compounds which are used for the growth of the body, for the repair of muscles and tissues.Carbohydrates and fats produce heat energy in the body. Minerals build the bones and tissues. Vitamins protect the body from some diseases. Water is the main constituent of the cells. It carriers the nutritive substances and oxygen to the different parts of the body. Because of the deficiency of any nutritive substances we become ill. Hence we conclude that it the deficiency of the nutritive elements in the blood that cause hunger