They can control gas exchange in the tissues. When they are constricted, there is almost complete no gas exchange. The blood just bypasses the tissues.
precapillary sphincters
a local increase in pH
a local increase in pH
Capillary beds
Capillaries make possible the exchange of molecules between blood and interstitial fluid. Sphincters open and close to regulate the flow of blood through capillary beds.
Exchange
Arterioles.
the Precapillary Sphincters control blood pressure and body temperature by regulating the flow of blood to the capillary bed.
Capillary washout is a stage of shock that is irreversible. When capillary washout occurs all cell functions stop and the cells die. There is large amounts of potassium acid forced in to the openings of the capillary sphincters and begin to form clots.
No
capillary beds
Infants have a higher density of capillary beds in their tissues, which supports their rapid growth and metabolic demands. This extensive capillary network facilitates efficient oxygen and nutrient delivery while also aiding in thermoregulation. As infants grow, the distribution and density of these capillary beds change to adapt to their developing body and physiological needs.