Precapillary resistance

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Precapillary resistance
Illustration of a capillary system with precapillary sphincters, which are the regulators of precapillary resistance in the mesenteric circulation.

Precapillary resistance is the concept in which capillaries are able to utilize vasomotion, either opening by act of dilating and letting blood pass through or constricting their lumen, reducing bloodflow through the capillary bed whereby occluding passage of blood. It is not entirely clear how the precapillary resistance is created in many parts of the body.[1] Precapillary sphincters are smooth muscle structures that mediate the precapillary resistance in the mesenteric microcirculation.[1]

References

  1. ↑ 1.0 1.1 Sakai et. al (2013). "Are the precapillary sphincters and metarterioles universal components of the microcirculation? An historical review". J Physiol Sci. 2013; 63: 319–331. 

See also

Systemic circulation
Pulmonary circulation
Blood vessels
Arteries
Capillaries
Veins
Lymphatic

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