2:27 Journey of Sound to the Brain 6:51 The Circulatory System & The Heart 8:14 Circulatory System and Pathway of Blood Through the Heart 3:01 The Heart and Circulatory System - How They Work 7:57 Parts of the Cardiac System (Heart Anatomy) 9:43 Electrical system of the heart | Circulatory system physiology | NCLEX-RN | Khan Academy 9:26 Кровеносная система. Часть 1: Сердце. 12:08 Проводящая система сердца 0:19 How the Ear Works 5:17 The science of hearing - Douglas L. Oliver 5:13 Conduction system of the heart - Sinoatrial node, AV Node, Bundle of His, Purkinje fibers Animation 11:21 Anatomy of the Heart (Layers, Conducting System & Topography) 10:51 Electrical Conduction System of the Heart Cardiac | SA Node, AV Node, Bundle of His 1:09 Hearing