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1.Small intestine:
Slowly digested food begins to reach the small intestine like a small liquid chyme, one hour after eating. After four or five hours the abdomen is gone. [32]

In the small intestine, pH becomes important; it needs to be properly measured in order to activate digestive enzymes. The chyme is very acidic, has a low pH, as it is excreted in the stomach and needs to be made more alkaline. This is found in the duodenum with the addition of bile from the bladder combined with the secretion of bicarbonate from the pancreatic sac and bicarbonate-rich mucous membranes from duodenal glands known as Brunner's glands. The chyme reaches the intestines and is removed from the stomach through the opening of the pyloric sphincter. Mixing in the resulting alkaline fluid promotes gastric acid which can damage the intestinal lining. Part of the mucus rubs against the walls of the intestines.

When reduced digestive cells are reduced in size and shape, they can be absorbed by the intestinal wall and transported to the bloodstream. The first receptor for this chyme is the duodenal bulb. From here it progresses to the first third of the small intestine, the duodenum. (The next category is jejunum and the third is ileum). The duodenum is the first and shortest stage of the small intestine. It is an empty, compact C tube that connects the abdomen with jejunum. It begins in the duodenal tube and ends in the skeletal muscle of the duodenum. The attachment of the suspicious muscle to the watch is thought to aid the passage of food by making a wide angle at its attachment.

Most digestive processes occur in the small intestine. Phase division works by mixing and moving the chyme slowly in the small intestine allowing for more time to absorb (and this continues in the large intestine). In the duodenum, pancreatic lipase is secreted along with co-enzyme, colipase for further digestion of chyme fat content. From this breakdown, tiny particles of emulsified oil called chylomicrons are produced. There are also digestive cells called enterocytes that enter the intestines (most of which are in the small intestine). They are unusual cells because they have villi on their surface and they also have countless microvilli on their surface. All of these villi form a large area, not only the absorption of chyme but also its continuous digestion by the large amount of digestive enzymes present in the microvilli.

Cylomicrons are small enough to pass through enterocyte villi and enter their lymph capillaries called lacteals. The milky fluid called chylene, which contains mainly the emulsified oil of chylomicrons, is derived from a thin layer of lymph in the lacteals. [Clarification required] Chyle is then transported through the lymphatic system to the rest of the body.

The threatening muscles mark the end of the duodenum and the separation between the upper abdominal bone and the lower GI tract. The digestive tract continues as the jejunum continues as the ileum. Jejunum, the middle line of the small intestine consists of circular folds, layers of double mucosal mucus that rotate slightly and sometimes completely surround the light of the intestines. These villi-bound folds work to increase the surface area of ​​the jejunum which enables increased absorption of digested sugar, amino acids and fatty acids in the blood. Round folds also reduce food flow and provide more time for nutrients.

The last part of the small intestine is the ileum. This contains villi and vitamin B12; Bile acids and any nutrients enter here. When the chyme is depleted of its nutrients the remaining waste is converted into a solid thirst called feces, which spreads to the large intestine, where the bacteria in the stomach of the vegetable continue to break down the remaining protein and starch. [33]


The passage time in the small intestine is approximately 4 hours. Half of the food scraps were eaten from the small intestine at an average rate of 5.4 hours after ingestion. Removal of small intestines is completed after an average of 8.6 hours. [31]

2.Cecum:
The cecum is a sac that indicates the separation between the small intestine and the large intestine. It lies under the ileocecal cap in the lower quadrant of the abdomen. [34] The cecum acquires a chyme in the last part of the small intestine, the ileum, and binds to the ascending colon of the large intestine. In this junction there is a sphincter or valve, a ileocecal valve that blocks the passage of chyme from the ileum, allowing further digestion. It is also an appendix attachment site. [34]
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