Digestion Parietal

Parietal digestion

The human digestive system has many functions, including breaking down food into nutrients and removing waste from the body. One of the important processes is digestion, which occurs in the stomach and intestines. However, in addition to this, there is another important process called parietal digestion.

What is parietal digestion?

Parietal digestion is a process in which digestive enzymes adsorbed on the microvilli of the intestinal mucosa break down nutrients. This process occurs in the upper intestines, where there are not a large number of digestive glands, but there are many microvilli that adsorb enzymes on their surface.

How does parietal digestion occur?

When food enters the intestines, it passes through the stomach, where the primary breakdown of proteins, fats and carbohydrates occurs. Then it enters the small intestine, where secondary breakdown of proteins and fats occurs. At this moment, parietal digestion occurs, when enzymes adsorbed on the surface of intestinal microvilli begin to break down nutrients.

What enzymes are involved in parietal digestion?

Various enzymes are involved in parietal digestion, including amylase, lipase and protease. Amylase breaks down carbohydrates, lipase breaks down fats, and protease breaks down proteins. These enzymes are adsorbed on the surface of the microvilli and begin to work, breaking down nutrients into simpler compounds, which are then absorbed into the blood and lymph.

What is the importance of parietal digestion for the body?

Parietal digestion plays an important role in the nutrition of the body. It allows you to make the most of the nutrients in your food, leading to better health and more energy.

The digestive process in the human body begins immediately after eating. Through mechanical chewing, digestive enzymes contained in saliva break down proteins. In the mouth, under the influence of amylase and maltase, the process of converting carbohydrates (starch and cellulose) into monosaccharides (glucose and fructose) begins. Approximately 60% of digestive carbohydrates are starch. In addition to carbohydrates, glycogen is lysed in the oral cavity under the action of amylase. The resulting glucose is absorbed into the blood.

The main part of the carbohydrates of the digestive process is processed inside the stomach. IN