Histological anatomy of the small intestine.. External serous layer. The muscle layer is external, longitudinal and circular. Subcutaneous layer. Mucous layer

If we have a longitudinal section of the intestine we find 4 layers of tissue are arranged from the outside to the inside:
1 - The outer serous layer: It is the visceral vertebra of the peritoneum, it encapsulates the entire fasting and dandruff, and covers the front face of the bum only, and the face of the back of the cuff does not cover a serous layer, so the possibility of bleeding ulcers on the face of the back of the cuff more than the front, Cover with a serpent.
2 - muscle layer: It is two layers of muscle:
- Longitudinal: Be in the colon in the form of non-continuous packages.
- Indoor circular.
3 - Subcellular layer: Vascular mass (connective fibers + vascular endings), and contains in the area of ​​the beginning (bulb) on the glands called glands Brunner Brunner plays an important role in the modification of acidity of the material coming from the stomach by its components (Bicarbonat + alkaline materials).
4. The mucous layer: A single layer of epithelial (lining of the small intestine) covering the special plate (Koreans). The mucous layer is separated from the mucous membrane by a thin layer of smooth muscular muscle fibers.