Anatomic and Histological Observation and a Preliminary Study on Physiologic Function from the Capital Immune Organ of Africa Ostrich
|School||Henan Agricultural University|
|Course||Basic Veterinary Science|
|Keywords||African ostrich Immune system Thymus Spleen Bursal Anatomy Histological|
African ostrich (Africa ostrich) are Aves, ostrich-shaped head, ostrich Branch, is the world's largest existing individual birds, African ostrich, since the 1980s, due to its excellent production performance in China's rapid promotion. Lymphoid organs is important defense means in the animal body, on the one hand, to participate in the body's immune response, on the other hand phagocytic bacteria and foreign objects into the body, and having a filtration effect. Lymphoid organs can continue to produce lymphocytes formed elements of blood, so also the hematopoietic organ. The African ostrich lymphoid organs including the thymus, spleen, bursa main composed of lymphoid tissue that they are all based on the network organization. The thymus is the primary lymphoid organs, spaces produce and nurture cell immune activities on a variety of specific T lymphocytes play a central role in cellular immunity. Spleen and peripheral lymphoid organs during embryonic development appeared later involved in the body's immune response, hematopoietic, filtering blood off the blood, blood storage organ. Bursa of Fabricius (bursa of Fabricius), also known as bursa is a unique avian immune organs. Bursal gradual degradation of in ostrich 16-18 months after sexual maturity is not easy to find. Bursal Establishment ostrich early immune system has a critical role. First, gross anatomy seen through the the African ostrich thymus, spleen and bursa Grossly, aims to understand the location and structural features ostrich three lymphoid organ morphology. Ostrich thymus is located on both sides of the back of the neck, along the neck ventrolateral distribution was watercress like a small number, gathered the group lobulation obvious connective tissue connected to each other. Ostrich spleen oval, dark red color, is located in the right kidney after tail vein before stomach constitute wedge position. Ostrich bursa is located in the back side of the cloacal bulge upward, circular, its mucosa milky white, grainy surface, visible obvious membranous folds. Provide a theoretical basis for further study of the African ostrich thymus, spleen and bursa histological structure, in order to explore its physiological function, immune function and disease prevention, the experiment through the production of paraffin section, H \u0026 E staining, microscopy its organizational structure. African ostrich thymus coated with a thin layer coating, it extends into the gland substance divided into incomplete lobules, each lobule can be divided into cortical and medullary thymic medulla. Thymus generally circular or oval shape, by the multilayer was surrounded concentrically arranged in a flat shape epithelial reticular cells. The the African ostrich spleen outsourcing capsule, capsule of connective tissue to form underdeveloped parenchymal depth trabecular the white pulp periarterial lymphatic sheath, the local position of the formation of the spleen bodies, but no germinal centers; ellipsoid volume number, strong eosinophilic homogeneous formation of clear boundaries between the ellipsoid and peripheral lymphoid tissue; distribution of red pulp between the white pulp, including splenic cord and spleen sinus. The African ostrich bursal wall with a four-layer structure, the mucosa, submucosa, muscle layer, serosa. Mucosal folds form a vertical line, between the folds tightly packed, granular surface texture, color white. The mucosal epithelium stratified squamous epithelium, transitional to lymphoid nodules into monolayer cells coated, cells were flat or cuboidal. Submucosa connective tissue deep within the folds formation of trabeculae, the lymphoid nodules single attachment trabecular projecting cysts formation of nodules.