Wall which surrounds the abdominal cavity in front.

This is the gateway to the abdominal cavity anteriorly. It exposes the true intraperitoneal structures such as the small intestine, stomach, distal duodenum, transverse colon and sigmoid colon

It is provided with the following layers

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Skin

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Superficial fascia

Superficial fascia has two layers-

  1. Camper's fascia- superficial fatty layer of superficial fascia
  2. Scarpa' fascia- deep membranous layer of superficial fascia

THERE IS NO DEEP FASCIA

 Layer of muscles which are arranged in three strata

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External oblique muscle of abdomen

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Internal oblique muscle of abdomen

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Transversus abdominis

The three layers correspond to the three layers of muscles in the intercostal spaces which are the external intercostal, internal intercostal and innermost intercostal  muscles

The remaining layers are

  1. Transversalis fascia

  2. Parietal peritoneum

Arteries of anterior abdominal wall

Rectus sheath is supplied by 

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Superior epigastric artery

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Inferior epigastric artery

And contains rectus abdominis, a median muscle

The flanks are supplied by

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Intercostal arteries

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Lumbar arteries

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Part of internal thoracic artery

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Musculophrenic artery

 

Veins:

The veins do not follow the artery. The veins that drain the anterior abdominal wall pass from the umbilicus in a radiate manner, resembling the spokes of bicycle wheel. They pass to the great saphenous vein below the umbilicus and to the lateral thoracic vein  from where they reach the axillary vein above the umbilicus. Some drain via the ligamentum teres to the portal vein and hence may become distended in portal obstruction leading to formation of the so-called caput medusae and also a distended thoraco-epigastric vein (inguino-axillary vein) at the mid-clavicular line.

Venous anastomoses

Nerves:

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T7 nerve ventral ramus

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T8 nerve ventral ramus

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T9 nerve ventral ramus

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T10 nerve ventral ramus

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T11 nerve ventral ramus

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T12 nerve ventral ramus, especially for pyramidalis

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L1 nerve ventral ramus, especially for conjoint tendon of internal oblique and transversus abdominis at the roof of inguinal canal. The L1 nerve is divided into
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Ilioinguinal nerve

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Iliohypogastric nerve

Ligaments

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Inguinal ligament: This separates the anterior abdominal wall from the thigh

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Lacunar ligament

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Reflected inguinal ligament.

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Thoracoclumbar fascia

Links

Abdomen layers

Rectus sheath

Inguinal triangle

Lumbar triangle

Scrotum

Hernia

Clinical regions

Video-CS

Abdominal incisions

 

 

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Plastic surgery

Abdominal dissector Abdomen locator Abdomen rotator


There is nothing in anatomy not found in this website

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Creator:
Oluwole Ogunranti

 
Layers of abdominal wall


Locator of abdomen video. Check female abdomen locator. Check male abdomen locator

 

 


 

 

ABDOMINAL LOCATOR/DIGITAL LOCATOR OF ANTERIOR ABDOMINAL WALL: Layer 1 Skin of abdomen (anterior abdominal wall). Layer 2- Layer of Camper's fascia. Layer 3 - layer of Scarpa's fascia. Layer  4 - layer of external oblique muscle/aponeurosisLayer 5- layer of rectus sheath. Layer 6- layer of internal oblique. Layer 7 - layer of transversus abdominis. Layer 8- layer of transversus abdominis/parietal peritoneum. Layer 9- layer of greater sac of peritoneum. Layer 10- layer of small intestine. Layer 11- layer of transverse colon. Layer 12- layer of posterior abdominal wall. Layer 13 - layer of deep posterior abdominal wall. Layer 14 - layer of bones of abdominal region..Rollover mouse to label, click to display page. Click here for female abdomen locator Laparotomy showing layers of abdominal wall in surgery

 

 

 


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