Lecture Notes - Stomach & Spleen

The streaming video of the 2004-5 lab overview is available on the web (password protected).
The computer presentation used by Dr. Stribley in lecture is available on the web (password protected). You can also download the PowerPoint presentation to print or review.

Foregut Structures (supplied by the celiac trunk): abdominal esophagus, stomach, spleen, proximal half of duodenum, pancreas, liver and biliary system.
  1. Review of the Developmental Anatomy and Peritoneal Relationships:
    1. Dorsal mesentery: greater omentum (gastrophrenic, gastrosplenic, gastrocolic ligaments and omental apron)
    2. Ventral mesentery: lesser omentum (gastrohepatic and gastroduodenal ligaments)
    3. Omental bursa (lesser sac) and epiploic foramen (of Winslow)
    4. Relationship to transverse mesocolon
  2. Abdominal Esophagus - Descends through the esophageal hiatus of the diaphragm.
  3. Stomach - fixed at T11 and L1 or L2
    1. Nerves
      1. Sympathetic: postganglionic fibers from the celiac ganglia (preganglionic fibers from the greater thoracic splanchnic nerve, T5 - T9 or 10)
      2. Parasympathetic: from the vagus (X)
        1. Anterior vagal trunk (continuation of the left vagus)
          • gastric branches
          • hepatic branch
        2. Posterior vagal trunk (continuation of the right vagus)
          • gastric branches
          • celiac branch
    2. Parts: cardia, fundus, body, and pylorus (pyloric antrum, canal, and sphincter)
    3. Blood Vessels:
      1. Arteries - Celiac trunk (axis)
        1. Left gastric artery:
          • gastric branches
          • esophageal and hepatic branches
        2. Splenic artery:
          • splenic branches
          • short gastric branches
          • left gastro-omental (gastroepiploic) a.
        3. Common hepatic artery:
          • proper hepatic a. - right gastric a.
          • gastroduodenal a. - right gastro-omental (gastroepiploic) a.
      2. Veins - Portal Vein: venous blood from the abdominal digestive organs.
        1. Directly into the portal vein:
          • left gastric v. (plus esophageal v.) and right gastric v.
        2. Via superior mesenteric vein: right gastro-omental v.
        3. Via splenic vein:
          • splenic branches
          • short gastric branches
          • left gastro-omental v.
          • inferior mesenteric v.
    4. Lymphatic Drainage: four regions drain into the celiac nodes near the celiac trunk.
  4. Spleen
    1. Projection on ribs, 9th, 10th and 11th.
    2. Visceral surface - contact stomach, kidney, pancreas, and left colic flexure.
    3. Hilum - site of entrance of the splenic vessels.
    4. Costal (diaphragmatic) surface
    5. Internal structure: no regular segmentation.
    6. Capsule: thin and easily ruptured, difficult to repair.