Spleen

A condensation of multiple mesenchymal clusters gives rise to the spleen within the elongated dorsal mesentery of the stomach. The more anterior portion of the meso-gastrium connects the spleen to the stomach, becoming the gastrosplenic ligament. That portion of the mesentery between the spleen and the posterior abdominal wall becomes the lienorenal (splenorenal) ligament (Fig. 2-5). As the dorsal bulge of the stomach rotates, the elongated mesogastrium carries the developing spleen to the left. This dorsal mesentery then partially fuses with the posterior abdominal wall over the left kidney, forming the definitive lienorenal ligament (Fig. 2-57). If the various cell clusters do not fully unite, excessive splenic lobulation or an accessory spleen may result.108,109

Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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