BTEC Applied Science Unit 5 - The Heart

Function of the Right Pulmonary Artery - Answer - Carried deoxygenated blood to the right lung Function of the Aorta - Answer - Carries oxygenated blood from the left ventricle to the rest of the body Function of the Left Pulmonary Artery - Answer - Carries deoxygenated blood to the left lung Function of the Left Pulmonary Vein - Answer - Carries oxygenated blood to heart from left lung Function of Semilunar Valve - Answer - prevent backflow of blood from aorta to ventricles Function of the Atrioventricular (Bicuspid) Valve - Answer - Prevent backflow of blood from Left Ventricle to Left Atrium Function of the Septum - Answer - Cardiac muscle that divides the left and right side of heart Function of Purkinje Fibres - Answer - Carry nerve impulses to ventricles to ventricles to aid contraction Function of the Inferior Vena Cava - Answer - Carries deoxygenated blood from the lower body to the heart Function of the Bundles of His - Answer - transmit impulses from AV Node to ventricles Function of Atrioventricular (Tricuspid) Valve - Answer - Prevent backflow of blood from Right Ventricle to Right Atrium Function of Sinoatrial Node (SA Node) - Answer - The pacemaker of the heart, which is responsible for the regular contraction of the heart muscle. Function of the Right Pulmonary Vein - Answer - Carry oxygenated blood to the heart from right lung Function of the Superior Vena Cava - Answer - Carry deoxygenated blood from upper body to Right Atrium Step 1 of Blood Flow(deoxygenated) - Answer - Aorta relax and fill with blood from Superior and Inferior Vena Cavae Step 2 of Blood Flow (deoxygenated) - Answer - Atria Contract (Atrial Systole) which forces AV valves open and blood moves through to fill ventricles Step 3 of Blood Flow(deoxygenated) - Answer - AV Valves close shut to prevent backflow Step 4 of Blood Flow (deoxygenated) - Answer - Ventricles contract (Ventricular Systole) - increases pressure Step 5 of Blood Flow