The immediate effect of changed perfusion pressure and the subsequent adaptation in the isolated ventricle of the marine gastropod , (Prosobranchia)

Circulatory regulation in an open system: Haliotis corrugata (Mollusca, Gastropoda)

“…However, the slow onset and decay of contractility were similar to that of vertebrate hearts. Hill and Irisawa (1967) in ternally pressurized the isolated ventricle of the marine gastropod Rapana thomasiana and measured output while changing the perfusion pressure. The ventricular output increased as head pressure was raised from 25 cm H2O to a plateau at a head of 85 cm HgO which, after a pressure drop in the tubing, corresponded to an internal perfusion pressure of about 40 cm of H2O.…”