Search results
Results From The WOW.Com Content Network
The phagocytes move by a method called chemotaxis. When phagocytes come into contact with bacteria, the receptors on the phagocyte's surface will bind to them. This binding will lead to the engulfing of the bacteria by the phagocyte. [11] Some phagocytes kill the ingested pathogen with oxidants and nitric oxide. [12]
A cell that performs phagocytosis is called a phagocyte. The engulfing of a pathogen by a phagocyte. In a multicellular organism's immune system, phagocytosis is a major mechanism used to remove pathogens and cell debris. The ingested material is then digested in the phagosome.
Forms terms denoting conditions relating to eating or ingestion Greek φαγία (phagía) eating < φᾰγεῖν (phageîn), to eat Sarcophagia-phago-eating, devouring Greek -φᾰ́γος (-phágos), eater of, eating phagocyte: phagist-Forms nouns that denote a person who 'feeds on' the first element or part of the word
[59] [60] [61] These early-invading, phagocytic macrophages reach their highest concentration about 24 hours following the onset of some form of muscle cell injury or reloading. [62] Their concentration rapidly declines after 48 hours. [60] The second group is the non-phagocytic types that are distributed near regenerative fibers.
Scanning electron micrograph of a phagocyte (yellow, right) phagocytosing anthrax bacilli (orange, left). The history of phagocytosis is an account of the discoveries of cells, known as phagocytes, that are capable of eating other cells or particles, and how that eventually established the science of immunology.
In anatomy the term reticuloendothelial system (abbreviated RES), often associated nowadays with the mononuclear phagocyte system (MPS), was employed by the beginning of the 20th century to denote a system of specialised cells that effectively clear colloidal vital stains (so called because they stain living cells) from the blood circulation.
Just like phagocytes, pathogens may evade or infect neutrophils. [68] Some bacterial pathogens evolved various mechanisms such as virulence molecules to avoid being killed by neutrophils. These molecules collectively may alter or disrupt neutrophil recruitment, apoptosis or bactericidal activity.
The mononuclear phagocyte system and the monocyte macrophage system refer to two different entities, often mistakenly understood as one. [citation needed] "Reticuloendothelial system" is an older term for the mononuclear phagocyte system, but it is used less commonly now, as it is understood that most endothelial cells are not macrophages. [2]