ANP 1105 Study Guide - Final Guide: Ileum, Basement Membrane, As Blood Flows

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1105
• Professor: William Staines

Document Summary

Cardiac cycle = all of the events associated with one heartbeat. Systole = the period of ventricular contraction and ejection of blood. Diastole = the period of ventricular relaxation, during which the ventricles fill with blood. Each cardiac cycle takes about 0. 8 sec (systole 0. 3 sec and diastole 0. 5 sec. Each hr = 75 beats/60 sec; 1 beat = 1/75 = 0. 8 sec. Important features driving cardiac cycle: (1) blood flow through the heart is controlled entirely by pressure changes (2) blood flows from higher to lower pressure through any available opening myocardium and cause the heart valves to open. ** electrical activity of left & right hearts is almost simultaneous. Quiescent period - all chambers are at rest and filling. The av valves are open, the semilunar valves are closed. Atrial systole - pushes the last 20% of blood into the ventricles. Ventricular systole ventricles contract permitting ventricular ejection of blood into the arteries.