BiologyNutrition in AnimalsJejunum and Ileum

Jejunum and Ileum

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    • Jejunum
    • Ileum
    • Villi
      • Function
      • Structure
    • Summary
    • What’s Next?

    In the previous segment, we learnt about the Duodenum. In this segment, we will learn about the Jejunum and Ileum.

    What is Jejunum?

    • The jejunum is the second part of the small intestine.
    • Very little digestion takes place in this part.
    • It is mainly responsible for the absorption of nutrients with the aid of Villi.

    What is Ileum?

    • The ileum is the third and the longest part of the small intestine.
    • The main function of this part is to absorb the necessary nutrients from the digested food with the help of Villi.

    What are Villi?

    • Villi are the finger-like projections present inside the surface of the small intestine to increase the surface area.

    What is the function of villi?

    • Villi increase the surface area of the small intestine significantly which aids in the maximum

    Absorption of the nutrients.

    What is the structure of villi?

    • Villi have Microvilli that further increase the surface area.
    • Each Villus has a Central Lacteal. A central lacteal is a projection of the lymphatic system.
    • The broken-down fat particles are absorbed through the central lacteal and then passed into the Lymphatic System.
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