Layers of Small Intestine
There are four layers of small intestine: Mucosa, Submucosa, Muscularis Mucosa, serosa.
Mucosa
- The small intestine mucosa performs digestive and absorptive functions, with a gastrointestinal epithelium covering the lamina propria.
- Villi and microvilli significantly increase the surface area for absorption, enhancing nutrient uptake.
Submucosa
- A thin layer of tissue supporting the mucosa and connecting it to the muscular layer.
- Contains blood vessels, lymphatic vessels, and nerves, including the submucous plexus.
Muscularis Mucosa
- The outermost layer of the mucosa, composed of elastic fibers and smooth muscle cells.
- Smooth muscle cells extend into the villi, aiding in movement and absorption.
Lamina Propria
- Connective tissue core of the villi, housing immune cells and nerve endings.
- Supports villi structure and function, facilitating nutrient absorption.
Serosa
- Thin membrane lining internal body cavities and organs, providing lubrication.
- Made of mesothelium tissue and allows frictionless movement within vital organs.
Small Intestine
The small intestine is a part of the digestive system. Studying the small intestine parts and functions is crucial for understanding the process of digestion and absorption of nutrients in the digestive system. In this article, we will discuss the small intestine’s location, function, and parts in detail.
Table of Content
- Small Intestine Parts and Function
- Parts of Small Intestine
- Duodenum
- Jejunum
- Ileum
- Functions of Small Intestine
- Protein Absorption
- Lipid Absorption
- Carbohydrate Absorption
- Absorption Mechanisms
- Layers of Small Intestine
- Mucosa
- Submucosa
- Muscularis Mucosa
- Serosa