Fatty acids are absorbed by the:
- lacteals
- pylorous
- colon
- capillaries
The Correct Option is A
Approach Solution - 1
Approach Solution -2
Lacteals are the lymph capillaries that absorb fats and lipids, which are found in the small intestine. The food we eat contains proteins, carbohydrates, fats, and other nutrients. So, all these nutrients are absorbed by the blood capillaries except the fats. Therefore, the lacteals are specially present for this purpose and have a larger diameter than a capillary.
So, now that we know what Lacteals are, let us now know the mechanism that takes place inside. Eventually when the food we intake will contain fats and these are not water soluble at all and also in the stomach itself fats get separated from the other substances and so here the lacteals help them in further digestion of lipids which are nothing but fats. In the small intestine, bile juice is released which supports the breakdown of lipids i.e. triglycerides are broken down into monoglycerides, fatty acids and glycerol. So, all these products combine with bile acids and form small micelles which forward move to the villi present in the small intestine and then the lipids get diffused into mucosal cells. Here all the fatty acids and monoglycerides are reconverted into triglycerides in the mucosal cells and then form chylomicrons and then enter the lymphatic vessel. So now in the last step before entering lymph vessels,as the fatty acids are converted into triglycerides, fats are absorbed in that form itself.
Therefore, the option ‘A’ is correct i.e lacteals
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Concepts Used:
Parts of the digestive system - Villi
Human Digestive System is the collection of organs that are responsible for digestion. It is a vital process that is driving the human race. The digestive system includes a digestive tract, which connects organs from the mouth to the large intestine.
Small Intestine
The Small intestine is an organ situated in the gastrointestinal tract where the food nutrients are absorbed completely. There is complete digestion of fats, proteins, and carbohydrates in the small intestine. It is the longest part of the alimentary canal ranging from 6 to 7.5 m. The small intestine of the human body is made up of three sections:
- Duodenum: It occurs in between the small intestine and jejunum.
- Jejunum: It is the second part of the small intestine. It is located in between the duodenum and ileum. There is the cell lining in the jejunum which is responsible for the absorption of nutrients. In this process, the surface area of the small intestine gradually increases because of the "villi". The villi are finger-like projections. Its function is to absorb some of the dietary nutrients such as amino acids, fatty acids, and sugars.
- Ileum: It is the third or the last part of the small intestine in the digestive system. It further opens into the large intestine.