This region measures around 3 feet in length. Jejunum – It is the middle section and is the primary site of nutrient absorption.The chyme gets mixed with bile and pancreatic juice here. It is the shortest region of the intestine. Duodenum- It is the first section which connects to the pyloric sphincter of the stomach.The small intestine is divided into three regions: They provide support to the tissues of the small intestine and also help in the transport of nutrients from intestines to the rest of the body. Many blood vessels, lymphatic vessels, nerves pass through the mesentery. There is a thin membrane called the mesentery that surrounds the small intestine and anchors it in place. It is a long convoluted tube-like organ, which is around ten feet in length and has a diameter of one inch. It has many physiological features that help in this absorption process. The small intestine has special cells that help absorb nutrients from the intestinal lining into the bloodstream. What happens to the Digested Food in the Small Intestine?

It is specially adapted to carry out this function.īrowse more Topics under Digestion And Absorption The small intestine is the organ where absorption occurs. This process occurs either by the passive, active or facilitated transport mechanisms in the body.

The process through which the end products of digestion are absorbed into the blood or lymph from the intestinal mucosa is called as Absorption. This entire process is summed up as Absorption and Assimilation. It delivers the nutrients to the rest of the body, as and when needed. The liver stores and processes these substances. Blood coming from the digestive organs carries simple sugars, glycerol, amino acids, and a few vitamins and salts to the liver. It is only through the blood and circulatory system that the digested food reaches various cells and tissues. As the food gets broken down into smaller and simpler particles, it has to get absorbed into the bloodstream.

Assimilation rate meaning