Volume of blood ejected by each ventricle per minute. CO is the same for each ventricle. B. Stroke volume is determined by myocardial contractility and end-diastolic volume . Myocardial contractility . End-diastolic volume .
Mechanism is same length-tension relationship observed in skeletal muscle.
Factors affecting resistance. D pressure resistance 3. Poiseuille's Law for laminar flow through a tube. Major resistance vessels are the arterioles . The most important factor in the regulation of blood pressure is the diameter of the arterioles .