Question

What is mainly digested by the stomach of man?

Answer 1

Hint: Digestion is the breakdown of large insoluble food molecules into small water-soluble food molecules so that they can be absorbed into aqueous plasma. In some organisms, these smaller substances are absorbed into the blood through the small intestine. Digestion is a form of catabolism, which is usually divided into two processes according to the way food is broken down: mechanical digestion and chemical digestion.

Complete answer:
The passage to the stomach is called the lower esophageal sphincter. This ring-shaped muscle opens and closes the passage between the esophagus and the stomach as needed. During digestion, the sphincter relaxes, allowing food to enter the stomach.
The stomach is a hollow organ, or “container,” that contains food when mixed with gastric enzymes. These enzymes continue the process of breaking down food into usable forms. The cells of the stomach lining secrete a strong acid and a powerful enzyme, which is responsible for the breakdown process. When the stomach contents are fully processed, it is released into the small intestine.
In the stomach, hydrochloric acid and a type of gastric enzyme called pepsinogen are released. Hydrochloric acid helps to dissolve food and kill unwanted microorganisms, and then converts pepsinogen into pepsin. Therefore, pepsin can perform the main digestive function of the stomach, that is, breaking down large protein molecules into small pieces called peptides.

Note:
The term mechanical digestion refers to the physical breakdown of large pieces of food into smaller pieces, which can then be entered by digestive enzymes. Mechanical digestion is carried out in the oral cavity by chewing and in the small intestine by stepped contraction. In chemical digestion, enzymes break food down into small molecules that the body can use.