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The spleen (from Anglo-Norman espleen, ult. from Ancient Greek σπλήν, splḗn) [1] is an organ found in almost all vertebrates. Similar in structure to a large lymph node , it acts primarily as a blood filter.
In human anatomy, the splenic artery or lienal artery, an older term, is the blood vessel that supplies oxygenated blood to the spleen. It branches from the celiac artery, and follows a course superior to the pancreas. It is known for its tortuous path to the spleen.
The cords of Billroth (also known as splenic cords or red pulp cords) are found in the red pulp of the spleen between the sinusoids, consisting of fibrils and connective tissue cells with a large population of monocytes and macrophages.
An accessory spleen is a small nodule of splenic tissue found apart from the main body of the spleen. Accessory spleens are found in approximately 10 percent of the population [ 1 ] and are typically around 1 centimetre in diameter.
Wandering spleen; Other names: Pelvic spleen, displaced spleen, drifting spleen, splenoptosis, floating spleen, splenic ptosis: A picture of an enlarged spleen taken using medical ultrasonography. Specialty: Angiology Causes: Connective tissue disease, complications of pregnancy
White pulp is a histological designation for regions of the spleen (named because it appears whiter than the surrounding red pulp on cross section), that encompasses approximately 25% of splenic tissue. White pulp consists entirely of lymphoid tissue.
The splenic vein is formed from small venules that leave the spleen. It travels above the pancreas, alongside the splenic artery.It collects branches from the stomach and pancreas, and most notably from the large intestine (also drained by the superior mesenteric vein) via the inferior mesenteric vein, which drains in the splenic vein shortly before the origin of the hepatic portal vein.
The red pulp of the spleen is composed of connective tissue known also as the cords of Billroth and many splenic sinusoids that are engorged with blood, giving it a red color. [ 1 ] [ 2 ] Its primary function is to filter the blood of antigens , microorganisms, and defective or worn-out red blood cells.