Which leukocyte is the main one involved in phagocytosis of parasites?
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Its the eosiniophils. They are responsible for counteracting parasitic infections. Don't listen to the others!! Im studying for a degree in microbiology and have jsut finnished a parasitology module!! You may also know them as acidophils.\n\nIf you don't believe me, check out somewehere like google or wikipedia, but im right.
675906
The spleen filters blood and gets rid of the old and dying red blood cells.  The spleen also hold extra blood within it.\n\nBone marrow is where red blood cells are produced.
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Innate immunity - non-specific to a particular pathogen, macrophages important cells here.  Also involves inflammation and acute phase response\n\nAdaptive immunity - specific and has 'memory cells'. Involves humoral immunity and cell mediated responses.  Involves reactions to specific antigenic challenges.\n\nComparative immunity - signal transduction pathways used to invoke immunity that are similar across a wide range of organisms - vertebrates, insects and even plants!!!  Don't really know much about this found it in a book, see source below!!!
838914
A phagocyte will engulf the bacteria, in the phagocyte, like a macrophage, there is a cell organell called a lysosome. In the lysosome are powerful hydrolytic enzymes. In the phagocyte the lysosomes fuse with the bacterial vesicle and the enzymes destroy the bacteria. This by the way does not work for the bacteria that causes TB.\na cell can produce a protein and exocytose the protein in a pinched off part of the plasma membrane called a vesicle.The final packaging of the protein is done by the golgi apparatus in the cell.\nActive transport is transport that uses energy. the energy source used is ATP produced by the mitochondria in the cell. A prime example of active transport is the sodium/potassium pump each living cell employs.
644369
cytotoxic T cells-helps to kill d antigen through phagocytosis.it takes the help of macrophage,natural killer cells and dendritic cells.or can say kills and removes d antigen or foreign bodies from the body.\n\nhelper T cell-helps the B cell to kill d antigen.\n\nsuppressor T cell as d name suggests supresses the antigen or supresses the disease.
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lysosomes, they are responsible for the release of corroding enzymes. The bacteria or invading pathogens are killed in the lysosomes. likewise the cells may induce destruction or apoptosis which would activate the lysosomes to pour in its corrosive enzymes and detroy the cell
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White blood cell (leukocyte) count.
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Lysosome\nFlagella\nCentriole\nCentrifuge\nMyofibrils
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Phagocytosis, but only certain bacterial cells, and certain human cells (macrophages, neutrophils etc); or endocytosis, which most cells can do
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wbc white blood cells protect your body from viruses\n\nrbc red blood cells distribute oxygen in your body.
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It is part of the white blood cells I believe.
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red blood cells (Erythrocytes), white blood cells (Luekocytes) (5 different types;  Neutrophils, Eosinophils, Basophils, Lymphocytes, Monocytes),Platelets
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Primary response is the killer T cells. When you get a sore throat, it is these crude cells that basically obliterate all the cells that are sick and the surrounding cells as well. It's kind of like "collateral damage". In the meantime, B cells are figuring out the exact antigen on the surface of the virus or bacteria and then multiply the appropriate antibodies to fight the particular foe. They are kind of like surgeon cells where the T cells are kind of like bazooka cells. The T cells are the primary and the B cells are the secondary immune responses, respectively.
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the main part of specific immune system is Tcell and Bcell...it's hard to explain in details but i try to sum up,when the antigen enters the bode Tcell works a APC and receives antigene parts by MHC on it,MHC stimulate the Tcell to produce IL and INF and these stimulate Bcells to produce specific antibodies against Ag...some of these antibodies destroy the Ag by stimulating the complements and other parts of immune system and some Bcells convert to memory cells for the next time
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vacuoles r mainly used to store stuff. during phagocytosis for eg, they compartmentalise ingested material. If the cell wants to eat whatever they took in, the vacuoles will typically fuse with lysosomes, and the lysosome will break down whatever's inside the vacuole by using nasty acids at pH 1-2(sometimes, lysosomes r called suicide bags, because on occassion, lysosomes pop and spill its acid into the cell and kills it... but normally, it's thick membrane stops that from happenin... lol)\n\nYa, vacuoles can also be used to transport material around the cell. The Golgi apparatus, for eg, uses it to transport membrane proteins to the plasma membrane.\n\nHope this helps!
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Neutrophils, or polymorphonucleocytes, are leukocytes (white blood cells) that are part of the first-response mechanism after cellular injury resulting in inflammation.  They leave now-leaky blood vessels in the vicinity of the injury and phagocytize(i.e. "eat") invading microorganisms and cellular debris.  Thus, they are part of the non-specific immunne response and to tissue injury in the same way whether the person has even been exposed to the cause of injury before.  They play no role in the specific (i.e. acquired) immune response.  Other white blood cells, such as the basophils, also play a role in the non-specific imflammatory response.  It is the macrophages and the different types of T and B lymphocytes that produce the specific (i.e. acquired) immune\nresponse, which leads to the efficient detection and destruction of microorganisms to which the person has been exposed at least once before.  The first exposure is known therefore as the immunizing exposure and often, though not always produces the disease associated with that organism;  subsequent exposures to the same microorganism produce a much greater and effective response that prevents recurrence of the disease. This is why those of us who are old enough had measles, mumps, and chickenpox only once.  Note that this immunizing exposure may be natural (exposure to a wild virus) or artificial (exposure to a modified virus in a vaccine).  This secondary immune response may take the form of rapid production of antibodies specific to that organism by modified, sensitized B lymphocytes called plasma cells. Or it could also take the form of attack on the organisms already inside host cells by sensitized cytotoxic T lymphocytes.  This specific immune response is triggered in the body by the presence of organisms that carry proteins on their surfaces that the immunized person's system recognizes as foreign, or "not-self".  The response can be fooled by viruses which are similar but not identical to the strain that produced the immunizing response.  This is why we can contract influenza and the common cold more than once in our lifetimes; the influenza virus modifies itself over time so that its surface proteins differ from strain to strain.  There are an enormous number of viruses that can cause the common cold, but they  all have different surface proteins, and so exposure to one will not produce immunity to all the rest.\n\nThe components of the specific immune system play another role in body defense.  The same system will immediately recognize as foreign cells coming from another person or the cells of a newly arisen cancer carrying unusual surface proteins.  They then orchestrate an elaborate response that destroys such cells, leading on the one hand to organ or tissue transplant rejection and on the other hand to early destruction of the new cancer before it has a chance to grow and spread.  Much research has gone into the development of  drugs that diminish the response to transplanted organs, and has led to greatly increased rates of organ transplant success in the last 25 years.  Research also continues into ways that the ability of the immune system to detect and destroy cancers, through the use of chemicals that stimulate that response or the augmentation of the response by administration of antibodies that have  been produced outside the person's body but are sensitized to the surface identity of a cancer's cells. \n\nA particular nasty characteristic of Human Immunodeficiency Virus, which causes HIV/AIDS, is that it can modify its surface proteins after it is already in the body of the infected person.  This means that while first exposure causes immunization and production of antibodies against the virus, the virus can nevertheless continue to evade the immune system by changing its surface "identity" and hiding inside even the host's own lymphocytes.  This is primarily why so little progress has been made in the
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Red blood cell: The blood cell that carries oxygen. Red cells contain hemoglobin and it is the hemoglobin which permits them to transport oxygen (and carbon dioxide). Hemoglobin, aside from being a transport molecule, is a pigment. It gives the cell its red color (and name). \nThe mature red blood cell (RBC) is a non-nucleated biconcave disk. Thanks to this unusual shape and its hemoglobin content, the RBC is superbly suited to the transport of oxygen. \nA red blood cell is sometimes simply referred to as a red cell. It is also called an erythrocyte or, rarely today, a red blood corpuscle.\n\nWhite blood cell: One of the cells the body makes to help fight infections. There are several types of white blood cells (leukocytes). The two most common types are the lymphocytes and neutrophils (also called polymorphonuclear leukocytes, PMNs, or "polys"). \n\nLymphocytes are made in lymphoid tissue in the spleen, lymph nodes, and thymus gland. There are different kinds of lymphocytes. Lymphocytes identify foreign substances from germs (bacteria or viruses) in the body and produce antibodies and cells that specifically target them. It takes from several days to weeks for lymphocytes to recognize and attack a new foreign substance. \n\nNeutrophils are also major players in the body's defense against bacterial infections. Neutrophils are made in the bone marrow and circulate in the bloodstream. Neutrophils move out of the blood vessels into the infected tissue to attack the bacteria. The pus in a boil (an abscess) is made up largely of neutrophils. Normally a serious bacterial infection causes the body to produce an increased number of neutrophils, resulting in a higher than normal white blood cell count (WBC). When the WBC is low, there may not be enough neutrophils to defend against bacterial infections. \n\nThe white blood cell count is done by counting the number of white blood cells in a sample of blood. A normal WBC is in the range of 4,000 to 11,000 cells per microliter. A low WBC is called leukopenia. A high WBC is termed leukocytosis. \n\nA normal absolute neutrophil count (ANC) is in the range of 1,500 to 8,000 cells per microliter. If the ANC is below 500 for an extended period of time, the risk of serious bacterial infection may increase significantly. A low neutrophil count is called neutropenia.