spleen histology diagram
Choose from 171 different sets of spleen histology flashcards on Quizlet. 5.9). cells engulf bacteria, parasites like those of Leishman-Donovan bodies in Kala-azar and foreign particles. Spleen is covered by a connective tissue capsule which is again enveloped by a serous membrane, the peritoneum. lymphoid tissue. 2,692 Views. Blood vessels, lymphatics and nerves pass through the hilus. The spleen is an organ located in the upper left abdomen, and is roughly the size of a clenched fist. 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. Before sharing your knowledge on this site, please read the following pages: 1. Biology, Humans, Lymphatic Tissues, Spleen, Structure of Spleen. 7cm 150 gr. Can you identify the germinal centres, white and red pulp, arterioles, other blood vessels and the capsule. The spleen is the largest mass of lymphatic tissue in the body, Elsayed Mohammed. The iron that is liberated from haemoglobin is at first stored in the splenic pulp cells. 7 years ago. What are antibiotics? histology practical first year mbbs blood and immunity. Free Download Abdomen,Spleen,Liver Anatomy and Physiology Diagrams. Sample Diagrams. Learn spleen histology with free interactive flashcards. It is the junctional region in between the white pulp and the red pulp, and consists of a meshwork of branched reticular cells in association with extracellular reticulum, into which many arterial vessels open. It shows how the artery has a lymphoid sheath surrounding the artery, See more ideas about Lymphatic system, Lymphatic, Lymph nodes. In dogs, the spleen increases in weight during the first 6 months of life (HoganEsch and Hahn, 2001). b. The red cell count seldom fails below 3 million per cu. The deep cortical, and medullary cords contain B-cells and plasma cells.Plasma cells live for 3 days, and make IgG type antibodies. Article by Amanda May-Sharman. Lesions of this important component of the immune system may center on the red pulp, the white pulp or involve both compartments The spleen … The trabecular (interlobular) branches pass along the trabeculae and after coursing for a certain distance the arteries may enter the splenic parenchyma. Splenectomised animals cannot be immunized against tetanus toxin. In anoxic conditions (such as in haemorrhage, asphyxia, severe muscular exercise, high altitude, etc. Free Download Abdomen,Spleen,Liver Anatomy and Physiology Diagrams. Capsule with its outer covering the peritoneum. Each structure is labelled and a great job done by Anosha. HISTOLOGY DIAGRAMS Monday, 29 February 2016. ii. There is no afferent lymphatic vessel. it removes defective red blood cells and platelets from the circulation. This is where the regions of white pulp are found. Many pyroninophil cells (probably plasma cells) are found in the splenic red pulp and hence the spleen is a chief site of immune body formation. Lymph node, spleen, thymus, tonsil- discussion, viva Lymphatic system: What is the function of lymphatic system? In thrombocytopenic purpura, splenectomy causes increase in the number of platelets in the blood. 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. iii. From the inner surface of the capsule and from the hilus many trabecular radiate into the substance of the spleen and subdivide or delineate the organ into many communicating compartments or lobules. Structure of the Esophagus. LYMPHATIC SYSTEM HISTOLOGY including lymph node, spleen, and the thymus! This mesh provides support for blood cells and cells of the immune system (lymphocytes, macrophages, and dendritic cells). In some pathological conditions, the spleen may undergo myeloid metaplasia and a large number of erythroblasts, megakaryocytes and myelocytes appear in the tissue. (80 -300 gr). Learn vocabulary, terms, and more with flashcards, games, and other study tools. Learn about its function, location in the body, and conditions that can affect the spleen. Histology Deptartment ... - Spleen: Scattered lymph follicles with central arteriole - Tonsil: St. sq.epith. Start studying spleen histology. Then as the artery loses its sheath and branches to form pencillar arteries, and sinusoids, making up the red pulp. All Answers (5) 3rd Aug, 2016. As well as acting as a store for platelets, it has two main functions: This eMicroscope is a section through part of the spleen. 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. 50.35 KB; Cite. Moderate degree of Hypochromic anaemia, being maximum after about one and a half months and recovering slowly during the following three to four months. enter and leave. Spleen 1. Later on, lymphocytes and in some cases eosinophils may also rise. But for confusion these terminology has been avoided in the literature in case of spleen and instead, white pulp has been used. There is diminished resistance against infections. Enlargement of spleen occurs in certain pathological conditions (Gaucher’s and Banti’s diseases, certain anaemias). 5.8 and Fig. Special histology- specific points . Splenectomy is adopted as a treatment for certain pathological conditions. 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. extensions into the spleen that subdivide it into sections of red pulp and white pulp. From here arterioles enter the red pulp. These types of cells are not present in adult spleen except in certain pathological conditions. The points in bold are specific features for a particular system and for a particular tissue. In the embryo, the spleen functions as a haemopoietic organ of some importance but in normal adult life it never functions in the formation of R.B.C. Trabeculae with blood vessels or without blood vessels. Circulatory System 1. In this article we will discuss about the structure of spleen with the help of suitable diagram. The inner cortex contains mostly T-cells. This diagram of a lymph node shows the pathways that lymphocytes can take, in and out of the lymph node. Cells- distributed throughout the body as single cells or aggregations of cells or … VIBS Histology 19,202 views It is observed that the spleen may release about 150 ml of blood (mainly erythrocytes) to circulation. connective tissue and smooth muscle. 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. The arterial capillary ultimately ends in the splenic venous sinuses. Spleen has got some influence on the formation of platelets. It is a modified lymphatic tissue and is mostly infiltrated with cells of the circulating blood. Content Guidelines 2. WebMD's Spleen Anatomy Page provides a detailed picture, definition, and information about the spleen. White … which leave from the hilium, and it does not have afferent lymph. When red cells of one species are repeatedly injected in another, a specific haemolysin is formed in the spleen. Furthermore enlargement also accompanies Malaria, Hodgkin’s disease, leukaemia. The spleen is an organ found in virtually all vertebrates. 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. In the adult, the spleen functions mainly as a blood filter, removing old red blood cells. Due to the presence of slow circulation in the spleen, CO cannot saturate all the splenic red cells. Share to Twitter Share to Facebook Share to Pinterest. Lymphoid Tissue - Part 1 (Lymph Nodes & Gut-Associated Tissue) - Duration: 26:33. Welcome to BiologyDiscussion! Share to Twitter Share to Facebook Share to Pinterest. The damaged cells are then phagocytosed by the numerous macrophages in the red pulp, that lie just next to the sinusoids. When spleen contracts these healthy red cells are turned out into the circulation and are used for carrying oxygen. Blood Vessels and Nature of Blood Circulation: At the hilus of the spleen, arteries enter and divide into several trabecular branches. They appear as continuous partitions in between the sinuses. Share Your Word File Haemoglobin breaks down and formation of bilirubin also takes place in the spleen (Biligenic function). Spleen Histology. STUDY. General histology specific points. Since spleen normally destroys red cells, anaemia after splenectomy is the exact opposite to one’s expectation. Spleen acts as a great reservoir of blood. Histologically it consists of (Fig. Name the types of nitrogenous bases present in the RNA. Click here. forming crypts + lymphatic follicles + Mucous glands. Here the arteriole is subdivided into several branches and as these vessels lie close like a brush, are called penicillar vessels. The function of lymphatic system is immunity / to protect the organism from invading pathogens or antigens; What are the components of lymphatic system? By visitors like you topic is beyond the scope of the histology in... Pulp contains myelocytes, erythroblasts and also megakaryocytes ( erythrocytes ) to circulation and white pulp as “ house. Discussion, viva lymphatic system a specific haemolysin is formed in the splenic venous sinuses the periarterial sheath. 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