H.A CARDII

• A hallow, muscular organ about the size of a closed fist

  Heart
• Organs that have a small or narrow cavity or lumen inside them

  Heart
• Between the lungs in the space, behind and to the left of the sternum

  Mediastinum
• The heart extend vertically in the area from


  Second to the fifth intercostal space
• The left border align with the

  Left midclavicular line
• The anterior chest area that overlies the heart and the great vessels

  Precordium
• Pumps blood to the lungs for gas exchange by removing CO2 from blood and replenishing Oxygen supply

  Right side (heart)
• Pumps blood to all parts of the body( systematic circulation)

  Left side (Heart)
• Great vessel leading directly to from the heart

  Veins
• Great vessel leading directly away from the heart

  Arteries
• Return blood to the right atrium from upper and lower torso

  Inferior and Superior Vena Cava
• Exits the right ventricle, bifurcates(splitting), and carries blood to the lungs

  Pulmonary Artery
• Return oxygenated blood to the left atrium


  Four pulmonary veins
• Transport Oxygenated Blood from the left ventricle to the body

  Aorta
• Upper chamber of the heart

  L&R Atria
• Lower chamber of the heart

  L&R ventricles
• A partition that separated the R&L side of the heart

  Septum
• Received blood returning to the heart and pump blood into the ventricles

  Thin-Walled Atria
• Pump blood out of the heart

  Thicker walled ventricles
• The left ventricles is thicker than the right ventricles because


  The left side of the heart has a greater workload
• The entrance and exit of each ventricles are protected by_ that direct the flow of blood through the heart

  One way valves
• Located at the entrance to the ventricles

  Atrioventricular (AV) valve
• 2 Av Valves


  Tricuspid valve, Mitral Valve
• Located between the R atrium and R ventricle

  Tricuspid Valve
• Located between the L atrium and L ventricle

  Mitral Valve (bicuspid)
• Located at the exist of each ventricles at the beggining of tge great vessels

  Semilunar valve
• What are the 2 semilunar valve

  Pumonary Valve, Aortic Valve
• Located at the entrance of the pulmonary artery as its exits the right ventricle


  Pulmonic Valve
• Located at the beginning of the ascending aorta as it exits the left ventricle

  Aortic valve
• Is a tough, inextensible, loosing-fitting, fibroserous sac that attaches to the great vessel and surrounds the heart


  Pericardium
• Serous membrane lining secrets a small of pericardial fluid that allows for smooth, friction-free movement of the heart


  Parietal Pericardium
• Covers the outer surface of the heart


  Epicardium
• Thickest layer of the heart, made up of contractile cardiac muscle cells


  Myocardium
• Innermost layer of the heart


  Endocardium
• What are the heart covering and walls

  Pericardium

  Parietal pericardium

  Epicardium

  Myocardium

  Endocardium
• They can spontaneously generate electrical impulse and conduct it through the heart

  Cardiac Muscle cells
• Specify the pathways of heart's conductive system

  SA node

  Bachmann's bundle and internodal pathways

  Atrioventricular node

  Ventricles

  Bundle of His

  R&L bundle branches

  Purkinje fibers
• Heart Peacemaker


  SA node
• Generation and conduction of electrical impulse by a specialized section of the Myocardium regulate the events associated with the filling and emptying of the catdiac chamber


  Cardiac Cycle
• Two Phases


  Diastole

  Systole