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Noun. 1. blood coagulation-a process in which liquid blood is changed into a semisolid mass (a blood clot). blood clotting. clotting, coagulation, curdling-the process of forming semisolid lumps in a liquid.1  Facebook.oun. 1. blood coagulation-a process in which liquid blood is changed into a semisolid mass (a blood clot). blood clotting. clotting, coagulation, curdling-the process of forming semisolid lumps in a liquid.
Autoregulation is a manifestation of local blood flow regulation. It is defined as the intrinsic ability of an organ to maintain a constant blood flow despite changes in perfusion pressure.his autoregulatory response occurs in the absence of neural and hormonal influences and therefore is intrinsic to the organ. When perfusion pressure (arterial minus venous pressure, P A-P V) initially decreases, blood flow (F) falls because of the following relationship between pressure, flow and resistance :