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What happens to the food we eat a in the stomach B in the small intestine?

Once filled with food, the stomach grinds and churns the food to break it down into small particles. It then pushes the small particles of food into the first part of the small intestine, called the duodenum. The small intestine is where most of the digestion and absorption of our food takes place.

How are food molecules absorbed into the small intestine?

Digested nutrients pass into the blood vessels in the wall of the intestine through a process of diffusion. The inner wall, or mucosa, of the small intestine is lined with simple columnar epithelial tissue.

What characteristics of the small intestine enable it to absorb digested food efficiently?

The small intestine has millions of tiny finger-like projections called villi. These villi increase the surface area for more efficient food absorption. Within these villi, many blood vessels are present that absorb the digested food and carry it to the bloodstream.

Why is absorption of digested food necessary?

As food particles break down into smaller particles, the process of absorption ensures that these particles are carried into the bloodstream. It is only through the process of absorption that digested food particles reach various cells, tissues and organs of our body.

Why do the stomach and small intestine have to dissolve the food you eat?

Food and drink must be changed into smaller molecules of nutrients before they can be absorbed into the blood and carried to cells throughout the body. Digestion is the process by which food and drink are broken down into their smallest parts so the body can use them to build and nourish cells and to provide energy.

Can you live a normal life without a stomach?

It may be surprising to learn a person can live without a stomach. But the body is able to bypass the stomach’s main function of storing and breaking down food to gradually pass to the intestines. Absent a stomach, food consumed in small quantities can move directly from the esophagus to the small intestine.

Can your intestines heal themselves?

The intestine is the most highly regenerative organ in the human body, regenerating its lining, called the epithelium, every five to seven days. Continual cell renewal allows the epithelium to withstand the constant wear and tear it suffers while breaking down food, absorbing nutrients, and eliminating waste.

What causes your intestine to die?

Intestinal ischemia occurs when the blood flow through the major arteries that supply blood to your intestines slows or stops. The condition has many potential causes, including a blockage in an artery caused by a blood clot, or a narrowing of an artery due to buildup of deposits, such as cholesterol.