![]() ![]() The spleen has only a thin capsule and is well-vascularized, so it is susceptible to injury and rupture, especially through trauma to the LUQ or left lower ribs. Sympathetic ( celiac plexus) and parasympathetic ( vagus nerve) innervation.Pancreatic veins from body and tail of pancreas.Hilum of spleen → meets superior mesenteric vein to form the portal vein.Supplies the pancreas while flowing superior to it ( retroperitoneal course until the hilum of the spleen).Located inside the splenorenal ligament.Vessels that arise from the splenic artery.Celiac trunk → superior border of pancreas → hilum of spleen → branches into central and penicillar arterioles.Vasculature and innervation of the spleen Only part of spleen that is not covered in peritoneum.Entry and exit point for splenic vasculature.Located on the visceral surface of the spleen.Filters old or misshapen RBCs and platelets out of circulation.The spleen is 1 inch (thick) by 3 inches (breadth) by 5 inches (length), weighs 7 ounces, and lies between the 9 th and 11 th ribs. Tail of the pancreas (at the hilum of the spleen).Left kidney (inferior, medial, and posterior).Protected by the left 9 th to 11 th ribs.Left upper quadrant ( LUQ) of the abdomen.Usually not palpable as it lies deep in the rib cage, but may be felt in individuals of slender build or those with splenomegaly.The spleen has two poles (superior and inferior) and two surfaces (diaphragmatic and visceral).Coffee bean-shaped, intraperitoneal organ.Asplenic patients should receive vaccinations against encapsulated organisms such as Streptococcus pneumoniae, Neisseria meningitidis, and H. The spleen is a well-vascularized organ that is susceptible to injury and rupture from blunt abdominal injury. In embryos, the spleen is the site of hematopoiesis. Marginal-zone macrophages are involved in the clearance of encapsulated pathogens. The white pulp consists of the periarterial lymphatic sheath and lymphoid follicles, which are involved in the production of antibodies. The red pulp consists of blood-filled sinusoids and cords that filter abnormal red blood cells and platelets. The spleen is composed of the white pulp and the red pulp, which are separated by the marginal zone. The spleen receives its sympathetic and parasympathetic innervation via the celiac plexus and the vagus nerve respectively. The lymphatics drain into the celiac lymph nodes. It is supplied by the splenic artery (a branch of the celiac trunk) and drained by the splenic vein, which joins the superior mesenteric vein to form the hepatic portal vein. As it lies deep within the rib cage, the spleen is generally not palpable except in particularly slender individuals or if it is pathologically enlarged ( splenomegaly). The spleen is an intraperitoneal organ located in the left upper quadrant of the abdomen that originates from the mesoderm. ![]()
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