THE SPLEEN

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DEVELOPMENT: It is mesodermal -- not derived from gut (i.e. non - gut)
  • It grows within the two layers of peritoneum going to the posterior wall -- within the two folds defining the dorsal mesogastrium.
  • As the stomach rotates, the spleen is moved to the left of the stomach (lateral to stomach)
  • The dorsal mesogastrium in this region becomes the gastrosplenic ligament.
  • Posterior part of mesogastrium adheres to the posterior wall, and the left kidney will then lie directly deep to it. This portion of the mesentery becomes the splenorenal ligament.

LOCATION: Upper left quadrant, left hypochondriac region, articulated with ribs 9-11 (laterally).

EXTERNAL MORPHOLOGY: It has three grooves (surfaces)

  • Renal Surface
  • Gastric Surface
  • Colic Surface: Anterior / Inferior extremity.
  • Hilus: Contains the Splenic artery and vein, near the splenorenal ligament.

RELATIONSHIPS:

  • Kidney is deep to it, connected by splenorenal ligament.
  • Stomach is medial to it, connected by gastrosplenic ligament.

VASCULAR / LYMPH SUPPLY:

Splenic Artery and Splenic Vein come into the hilus.

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