The abdominal layer refers to the different tissue planes that compose the abdominal wall. According to the provided reference, there are nine distinct layers that make up the abdominal wall. These layers provide structure, protection, and support for the abdominal organs.
Layers of the Abdominal Wall
The abdominal wall consists of multiple layers, each with specific functions:
- Skin: The outermost layer, providing a protective barrier.
- Subcutaneous Tissue: A layer of fat and connective tissue beneath the skin.
- Superficial Fascia: A layer of connective tissue that supports the skin and subcutaneous tissue.
- External Oblique Muscle: One of the major abdominal muscles.
- Internal Oblique Muscle: Another major abdominal muscle, lying beneath the external oblique.
- Transversus Abdominis Muscle: The deepest of the abdominal muscles.
- Transversalis Fascia: A fascial layer lining the inner surface of the transversus abdominis muscle.
- Preperitoneal Adipose and Areolar Tissue: A layer of fat and connective tissue located between the transversalis fascia and the peritoneum.
- Peritoneum: The innermost layer, a serous membrane lining the abdominal cavity.
Nerves, blood vessels, and lymphatics are present throughout these layers, providing innervation, blood supply, and lymphatic drainage to the abdominal wall.
