Anastomosis (plural anastomoses) describes a kind of network in i beg your pardon streams both branch out and also reconnect. The term is offered in medicine, biology, and also geology.
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Anastomosis is the surgical connection of two structures.<1> It commonly refers come connections between blood vessels or connections between other tubular structures such as loops that intestine. In circulatory anastomosis, many arteries normally anastomose v each other. Because that example: the inferior epigastric artery and also superior epigastric artery. In surgery, operation anastomosis occurs once a segment the intestine is resected and also the two remaining ends are sewn or stapled with each other (anastomosed). The procedure is described as intestinal anastomosis.
Pathological anastomosis results from trauma or an illness and might involve veins, arteries, or intestines. These are usually referred to as fistulas. In the situations of veins or arteries, traumatic fistulas typically occur between artery and vein. Traumatic intestinal fistulas usually occur between two loops of intestine (enetero-enteric fistula) or intestine and skin (enterocutaneous fistula). Portacaval anastomosis, through contrast, is an anastomosis in between a vein of the portal circulation and also a vein that the systemic circulation, which allows blood come bypass the liver in patients v portal hypertension, frequently resulting in hemorrhoids, esophageal varices, or caput medusae.
In evolution, anastomosis is a recombination of evolutionary lineage. Conventional accounts of evolution lineage present themselves as the an easy branching out of species into novel forms. Under anastomosis, varieties might recombine after ~ initial branching out, such as in the case of recent research which shows that humans and chimpanzees may have actually interbred after ~ an early stage branching out.<2> A second case in which the idea of anastomosis finds application is in the concept of Symbiogenesis, in which new forms the life (species) are seen to emerge from the formation of novel symbiotic relationships.
In geology, anastomosis is used to describe quartz (or other) veins displaying this property, which is often related come shearing in metamorphic regions. There is likewise a type of stream referred to as anastomosing, which consists of a large strath and multiple thalwegs separated by vegetated stabilized islands within subparallel banks.
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