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Spleen b. 1. Saved by Summer Ekelund. There two main types of tissue in the spleen are specialised for its two main functions: White pulp contains lymphoid aggregations, mostly lymphocytes, and macrophages which are arranged around the arteries. Welcome to BiologyDiscussion! This rise is chiefly due to the increase in the number of polymorphs. The blood from the splenic venous sinuses empty into the pulp vein which combines to form the large veins and ultimately blood return in the trabecular vein. In the hilus many trabecular veins join to form splenic veins and as such leave the spleen (Fig. Thus, in the post-natal life, spleen acts as a filter, which removes the old useless cells and allows only the young active cells to pass into the circulation. The recovery from this anaemia is due to the compensatory overgrowth of bone marrow. LYMPHATIC SYSTEM HISTOLOGY including lymph node, spleen, and the thymus! Trabeculae with blood vessels or without blood vessels. It is a highly vascular haemopoietic organ situated in the left hypochondrium directly beneath the diaphragm, above the left kidney and descending colon, behind the fundus of the stomach and weighing about 150 gms in adult. i. Theperitoneum covering thespleen, except in the hilum. This mesh provides support for blood cells and cells of the immune system (lymphocytes, macrophages, and dendritic cells). The lymphocytes are both T (mainly T-helper) and B-cells. Name the types of nitrogenous bases present in the RNA. White pulp scattered throughout the red pulp. HISTOLOGY DIAGRAMS Tuesday, 31 May 2016. HISTOLOGY DIAGRAMS Sunday, 29 March 2020. Spleen (lien) is the largest lymphoid tissue in the body and specialised, been-shaped organ for filtering blood. This is the Official Website of the histology department in Kasr Al Ainy School of Medicine, Cairo University. The spleen is an organ found in virtually all vertebrates. The deep cortical, and medullary cords contain B-cells and plasma cells.Plasma cells live for 3 days, and make IgG type antibodies. b. 23. The spleen is the largest accumulation of lymphoid tissue in the body. PLAY. The trabecular (interlobular) branches pass along the trabeculae and after coursing for a certain distance the arteries may enter the splenic parenchyma. In this way the vessels are en-sheathed with lymphocyte constituting the periarterial lymphatic sheath. which leave from the hilium, and it does not have afferent lymph. Cells- distributed throughout the body as single cells or aggregations of cells or … From here arterioles enter the red pulp. White Pulp - masses of WBC's - neutrophils, lymphocytes, macrophages. The spleen reaches peak development at puberty, in rats, followed by gradual involution (Losco, 1992). Download PDF. In anoxic conditions (such as in haemorrhage, asphyxia, severe muscular exercise, high altitude, etc. STUDY. The splenic pulp is of two distinct types: The white pulp is composed of typical lymphatic tissue whereas the red pulp is composed of an atypical lymphatic tissue. Posted by LP ANATOMY at 01:09 No comments: Email This BlogThis! HISTOLOGY Diagrams Hand-drawn CARDS 2ND YEAR MBBS These are hand-drawn histology diagrams by Demonstrator Dr. Shaista (Dept of Anatomy, KEMU) and submitted by Anosha. Treatment. Although in elderly patients atrophic changes can be present, in general it is only above 80 years of age that the composition of the spleen is severely altered and the weight of the spleen diminished. Lesions of this important component of the immune system may center on the red pulp, the white pulp or involve both compartments The spleen … ), spleen contracts and sends out the stored blood into the general circulation. These types of cells are not present in adult spleen except in certain pathological conditions. 1. blood supply to spleen. Start studying spleen histology. At various points along the course of the vessels where the infiltration of lymphocytes is greater, it forms spherical or ovoid nodules, called as splenic nodules of white pulp. central artery in white pulp . When red cells of one species are repeatedly injected in another, a specific haemolysin is formed in the spleen. Blood vessels, lymphatics and nerves pass through the hilus. Medical School Histology. Pathway of a Red Blood Cell. Spleen 1. ii. The arterial capillary ultimately ends in the splenic venous sinuses. In mammalian embryos the red pulp contains myelocytes, erythroblasts and also megakaryocytes. Spleen: the splenic anatomy is detailed in anterior and posterior views, as well as in an anatomical section of the spleen followed up by a diagram showing splenic histology. 5.8 and Fig. The iron that is liberated from haemoglobin is at first stored in the splenic pulp cells. spleen histology diagram - Google Search. 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