Abdominal wall
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Body cavities
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Diagram of sheath of Rectus above the arcuate line.
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Gray's
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The abdominal wall represents the boundaries of the abdominal cavity. The abdominal wall is split into the posterior (back), lateral (sides) and anterior (front) walls.
Additional recommended knowledge
There is a common set of layers covering and forming all the walls: the deepest being the extraperitoneal fat, the parietal peritoneum, and a layer of fascia which has different names over where it covers (eg transversalis, psoas fascia).
Superficial to these, but not present in the posterior wall are the three layers of muscle, the transversus abdominis (tranvserse abdominal muscle), the internal (obliquus internus) and the external oblique (obliquus externus).
Layers of anterior abdominal wall
In human anatomy, the layers of the abdominal wall are (from superficial to deep):
- there's NO deep abdominal fascia not to restrict abdominal distention e.g. respiration and pregnancy
Inner surface
The surface contains several ligaments separated by fossae:
See also
General anatomy of torso |
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Thorax/ Thoracic cavity | Mediastinum (Superior, Anterior, Middle, Posterior) • Superior thoracic aperture • Inferior thoracic aperture • Triangle of auscultation • Intercostal space • Thoracic plane • Thoracic wall/Thoracic cage - fascia (Pectoral fascia, Clavipectoral fascia, Thoracolumbar fascia) • Chest • Midsternal line |
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Thoracic diaphragm | openings (Caval opening, Esophageal hiatus, Aortic hiatus, Foramina of Morgagni) • Central tendon • Crus of diaphragm • arcuate ligaments (Lateral, Medial, Median) |
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Abdomen/ Abdominal cavity | Retroperitoneum • Paracolic gutters • Hepatobiliary triangle
anterior abdominal wall (Arcuate line, Linea alba, Tendinous intersection, Linea semilunaris, McBurney's point, Traube's space, Inguinal triangle) • Inguinal canal (Deep inguinal ring, Superficial inguinal ring, Intercrural fibers, Crura of superficial inguinal ring) • Lumbar triangle • regions (Epigastrium, Hypochondrium, Umbilical region, Latus, Hypogastrium, Inguinal region) • planes (Transpyloric plane, Intertubercular plane, Midclavicular line)
fascia (Fascia of Camper, Fascia of Scarpa, Transversalis fascia, Renal fascia, Rectus sheath) |
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Pelvis/ Pelvic cavity | Pelvic floor • Retropubic space fascia (Pelvic fascia, Superior fascia of diaphragm of pelvis, Inferior fascia of diaphragm of pelvis, Fascia of the Obturator internus, Tendinous arch, Iliac fascia) |
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Perineum | Anal triangle (Ischioanal fossa, Pudendal canal, Anococcygeal raphe)
Urogenital triangle (Superficial perineal pouch, Deep perineal pouch)
Perineal body
fascia (Dartos/fascia of perineum/superficial perineal fascia/Fascia of Colles, Perineal membrane/"Inferior fascia of UGD", "Superior fascia of UGD") |
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