Mononuclear phagocyte system
In immunology, the mononuclear phagocyte system or mononuclear phagocytic system (MPS) (also known as the reticuloendothelial system or macrophage system) is a part of the immune system that consists of the phagocytic cells located in reticular connective tissue. The cells are primarily monocytes and macrophages, and they accumulate in lymph nodes and the spleen. The Kupffer cells of the liver and tissue histiocytes are also part of the MPS. The mononuclear phagocyte system and the monocyte macrophage system refer to ...
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Peripheral blood mononuclear cell
A peripheral blood mononuclear cell (PBMC) is any peripheral blood cell having a round nucleus. These cells consist of lymphocytes (T cells, B cells, NK cells) and monocytes, whereas erythrocytes and platelets have no nuclei, and granulocytes (neutrophils, basophils, and eosinophils) have multi-lobed nuclei. In humans, lymphocytes make up the majority of the PBMC population, ...
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Neutrophil
Neutrophils (also known as neutrocytes or heterophils) are the most abundant type of granulocytes and the most abundant (60% to 70%) type of white blood cells in most mammals. They form an essential part of the innate immune system, with their functions varying in different animals. Neutrophil Neutrophils with segmented nuclei surrounded by erythrocytes and platelets. Intra-cellular granules are visible in the cytoplasm ( Giemsa stained). Details System ...
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Lymphocyte homing receptor
Lymphocyte homing receptor Lymphocyte homing receptors are cell adhesion molecules expressed on lymphocyte cell membranes that recognize addressins on target tissues. Lymphocyte homing refers to adhesion of the circulating lymphocytes in blood to specialized endothelial cells within lymphoid organs. These diverse tissue-specific adhesion molecules on lymphocytes (homing receptors) and on endothelial cells (vascular addressins) contribute to the development of specialized immune responses. Free lymphocytes constantly recirculate in blood after their re-entry from lymphoid tissue, via ...
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DNA re-replication
DNA re-replication (or simply rereplication) is an undesirable and possibly fatal occurrence in eukaryotic cells in which the genome is replicated more than once per cell cycle. Rereplication is believed to lead to genomic instability and has been implicated in the pathologies of a variety of human cancers. To prevent rereplication, eukaryotic cells have evolved ...
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Bacterial capsule
Bacterial capsule The bacterial capsule is a very large structure of many bacteria. It is a polysaccharide layer that lies outside the cell envelope, and is thus deemed part of the outer envelope of a bacterial cell. It is a well-organized layer, not easily washed off, and it can be the cause of various diseases. ...
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Basophil
Basophils are a type of white blood cell. Basophils are the least common type of granulocyte, representing about 0.5% to 1% of circulating white blood cells. However, they are the largest type of granulocyte. They are responsible for inflammatory reactions during immune response, as well as in the formation of acute and chronic allergic diseases, including ...
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Blood Clotting Mechanism
Blood clotting or coagulation, is an important process that prevents excessive bleeding when a blood vessel is injured. Platelets and proteins in plasma work together to stop the bleeding by forming a clot over the injury. The process by which a blood clot is formed. The formation of a clot is often referred to as ...
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Islets Of Langerhans
Location and Structure of Pancreas: Origin of Pancreas: It is derived from the endoderm of the embryo. The pancreas lies inferior to the stomach in a bend of the duodenum. It is both an exocrine and an endocrine gland. A large pancreatic duct runs through the gland, carrying enzymes and other exocrine digestive secre-tions from ...
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Virus (Structure)
Virus A virus is a Submicroscopic Organism that replicates only inside the living cells of an organism. Viruses can infect all types of life forms, ...
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