HN210 Lecture Notes - Lecture 10: Chordae Tendineae, Interventricular Septum, Aortic Valve
Document Summary
Contract to allow the valves to open & let blood into the ventricle. Contracts to send blood out of ventricle. Where electrical signals from brain (telling ventricles to contract) go through. 2 small holes that exit the aorta before any blood reaches the body. All but 1 vessel are found externally to the heart tissue. Not a lot of branching in the heart if one vessel gets damaged, there is no alternative root result in heart attack. Right coronary artery is much longer than left coronary artery. 2 atrial branches: feed tissue of right atrium. Marginal branch of right coronary artery (aka acute artery): runs along margin of heart. Posterior interventricular artery: directly in front of interventricular septum (aka posterior descending artery) Right dominance: posterior interventricular artery arises from right coronary artery (75% of pop) If it arises from right coronary artery = right dominated. Sits right on top of the ventricle. Blood travels from small veins to large veins.
