The Heart

June 17, 2016 Heart Anatomy

June 17, 2016 ■ hollow muscular organ ■ surrounded by a double-layered protective sac called the pericardium Heart Anatomy

June 17, 2016 ■ Acts as a double pump: ■ septum: ■ muscular wall separating the right side (deoxygenated) from the left side (oxygenated) right side left side lungs (pulmonary subsystem) body (systemic subsystem) & (cardiac subsystem) Heart Anatomy

June 17, 2016 Divided into 4 chambers: ■ 2 atria: ■ thin-walled upper chambers ■ receive blood from body via ■ send blood to the ventricles left atrium right atrium veins septum Heart Anatomy

June 17, chambers: (continued) ■ 2 ventricles ■ thick-walled lower chambers ■ receive blood from ■ send blood to body via left ventricle right ventricle left atrium right atrium arteries atria septum Heart Anatomy

June 17, sets of valves 1.atrioventricular valves (A-V) ■ between atria & ventricles ■ tricuspid (right) ■ bicuspid or mitral (left) function: ■ prevent backflow into atria when ventricles contract left ventricle right ventricle left atrium right atrium A-V (tricuspid) septum A-V (bicuspid) Heart Anatomy

June 17, sets of valves (continued) 2.semilunar valves (S-L) ■ in arteries leaving ventricles ■ pulmonary S-L (right) ■ aortic S-L (left) function: ■ prevent backflow into ventricles as the arteries snap back left ventricle right ventricle left atrium right atrium A-V (tricuspid) septum A-V (bicuspid) S-L (aortic) S-L (pulmonary) Heart Anatomy

June 17, 2016 Septum Heart Anatomy

June 17, 2016 right pulmonary artery left pulmonary artery right pulmonary vein left pulmonary vein right atrium left atrium superior vena cava pulmonary S-L valves aortic S-L valves right ventricle tricuspid A-V valves inferior vena cava left ventricle septum dorsal aorta (descending aorta) aorta (aortic arch) bicuspid/mitral valve to upper body Heart Anatomy

June 17, 2016 Heart Anatomy

June 17, 2016 myocardium = heart muscle endocardium = inner lining of the heart Heart Anatomy

June 17, 2016 Heart Anatomy – Cross Section

June 17, 2016 Heart Anatomy Coronary Artery & Vein

June 17, 2016 right pulmonary artery left pulmonary artery left pulmonary veins right pulmonary veins inferior vena cava superior vena cava right atrium right ventricle left ventricle left atrium aortic arch dorsal aorta coronary arteries coronary veins Heart Anatomy

June 17, 2016 Heart Anatomy

June 17, 2016 ■ ‘Anatomy of the Heart’ worksheet ■ Page 263 # 1 – 3 (blue section) ■ Crossword Puzzle Homework