What is Anastomosis
A nastomosis is a designation given to a network of channels that bifurcate and recombine at various points , such as blood vessels or leaf veins.
It is a term used in medicine, dentistry, biology, geology and anthropology.
Where Anastomosis is Applied
Medical – Dental – Biomedicine
In Medicine and Dentistry , anastomosis is the communication, natural or resulting from the surgical process, between tubes, blood vessels or nerves of the same nature.
It is also the name given to a surgical operation that promotes the union of two blood vessels, two parts of the digestive tract, etc.
An example of a surgical anastomosis is the gastroenterostomy: a link or connection between the stomach and an intestinal segment.
In the theory of evolution , the anastomosis is the recombination of evolutionary lineages .
The conventional evolutionary process, called speciation, involves branching off a species into new strains through genetic mutations.
Anastomosis occurs when two newly separated species intersect again . A recent study indicates that humans and chimpanzees may have interbred soon after differentiating between the two species.
The concept of anastomosis also applies to the theory of symbiogenesis , in which new species arise from the formation of new symbiotic relationships.
In geology, anastomosis refers to veins of quartz (or other materials) that have this property, often related to cutting into metamorphic regions.
It also refers to the geometry of bifurcation and intersection channels , very common in braided river systems and in anastomosed headwater systems, predominantly sandy and conglomerate.
Anastomosis is also a term that appears in Imaginary Anthropology (G. Durand): there the term functions as a metaphor for the initial concept .
Images or symbols that are connected by apparently distant points end up creating a symbolic network that is different from the rest.
Anastomosis can also occur in rivers that flow through very flat and flooded regions .
In hydrology studies, drainage channels are said to be characterized by a large volume of underload which, combined with discharge fluctuations, cause successive branches or multiple channels to subdivide and rediscover, separated by asymmetric islands and sandbanks.
The main bed ends up being divided into several arms that interconnect and subdivide, forming numerous islands. Such rivers are called anastomoses.
Types of Anastomosis
- Anti Peristaltic: Between two segments of the intestine joined so that their peristaltic waves travel in opposite directions.
- Arteriovenous: Between an artery and a vein.
- Heteroclad: Between branches of different arteries.
- Homocladica: Between branches of the same artery.
- Intestinal: Between two intestinal segments.
- Isoperistaltic: Between two segments of the intestine in which the peristaltic waves travel in the same direction.
- Latero lateral: Between two lateral faces of two intestinal loops.
- Lateroterminal: Between the lateral aspect of the intestine and the opening of the horizontal section of an intestinal segment.
- Convergent: Union of two arteries or veins at an angle to form a single trunk.
- Precapillary: Anastomosis between arterioles near their passage to capillaries.
- Arterial or sinusoidal: Anastomosis between the cardiac sinuses and the arteries or veins.
- End-Terminal : Between two ends of sectioned intestinal loops or between two vessels.
- Utero-tubal: Between the ureter and the oviduct.
- Uretero-ureteral: Between two segments of the same ureter.