What is parenchyma of spleen?
The splenic parenchyma consists of lymphatic follicles and reticuloendothelial cells, surrounding the arteries (‘white pulp’) and an interspersed network of vascular sinusoids (‘red pulp’).(1) The ratio of white to red pulp increases with age due to accumulated antigenic exposure and stimulation.
Why superior border of spleen is notched?
The notches on the surface of spleen are formed due to its lobulated origin. The spleen develops from mesenchymal condensation in the dorsal mesogastrium during the sixth week of gestation.
What is red pulp in spleen?
The spleen contains two main types of tissue – white pulp and red pulp. White pulp is material which is part of the immune system (lymphatic tissue) mainly made up of white blood cells. Red pulp is made up of blood-filled cavities (venous sinuses) and splenic cords.
Where is the spleen located in the human body?
The spleen is an organ in the upper far left part of the abdomen, to the left of the stomach. The spleen varies in size and shape between people, but it’s commonly fist-shaped, purple, and about 4 inches long. The spleen also helps fight certain kinds of bacteria that cause pneumonia and meningitis.
Are there any anomalies in the spleen?
Spleen can have a wide range of anomalies including its shape, location, number, and size. Although most of these anomalies are congenital, there are also acquired types.
Where are the three areas of impression found in the spleen?
Medial surface of the spleen shows three areas of impression. The colic area is the impression of the left colic flexure, the gastric area is the impression of the stomach, and the renal area is the impression of the left kidney. The splenic hilum is found in the central part of this surface.
Where are the splenic sinusoids found in the spleen?
The cords of Billroth (splenic cords) are the cellular aggregations supported by the reticular connective tissue. They appear as stripes and consist of of macrophages, plasmocytes and blood cells. Splenic sinusoids are found between the cords of Billroth. They are filled with blood and give the red pulp its distinguishable red appearance.