Anatomy and Physiology - Cardiovascular System | Questions and Answers with complete solution

Layers - Pericardium Epicardium Myocardium Endocardium Pericardium - Outer covering (tissue covering the heart) Epicardium - Outer layer Myocardium - Thick middle layer made of cardiac muscle Endocardium - Inner layer contains purkinje fibers Chambers - Right Atrium Right Ventricle Left Atrium Left Ventricle Right Atrium - Upper chamber Thin walls Receives blood returning from body Right Ventricle - Lower chamber Thick walls Receives blood from right atriaForces blood into arteries Left Atrium - Upper chamber Thin walls Receives blood returning from lungs Left Ventricle - Lower chamber Thickest walls Receives blood from left atrium Forces blood into arteries Septum - Prevents blood from mixing (in heart) Valves - Prevent back flow from blood to atria