Ch 19 Heart 1

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  1. –Heart and blood vessels
    •Cardiovascular system
  2. –Heart, blood vessels, and the blood
    •Circulatory system
  3. –right side of heart
    •Carries blood to lungs for gas exchange and back to heart
    Pulmonary circuit
  4. –left side of heart
    •Supplies oxygenated blood to all tissues of the body and returns it to the heart
    Systemic circuit
  5. What are the two major divisions of the circulatory system
    Pulmonary circuit and Systemic circuit
  6. –Fully oxygenated blood arrives from lungs via pulmonary veins
    –Blood sent to all organs of the body via aorta

    What side of the heart?
  7. –Lesser oxygenated blood arrives from inferior and superior venae cavae
    –Blood sent to lungs via pulmonary trunk

    What side of the heart?
  8. —double-walled sac (pericardial sac) that encloses the heart
    –Allows heart to beat without friction, provides room to expand, yet resists excessive
    –Anchored to diaphragm inferiorly and sternum anteriorly
  9. —outer wall of sac
    –Superficial fibrous layer of connective tissue
    –Deep, thin serous layer
    Parietal pericardium
  10. —heart covering
    –Serous lining of sac turns inward at base of heart to cover the heart surface
    Visceral pericardium (epicardium)
  11. —space inside the pericardial sac filled with 5 to 30 mL of pericardial fluid
    Pericardial cavity
  12. —inflammation of the membranes
    –Painful friction rub with each heartbeat
  13. •(visceral pericardium)
    –Serous membrane covering heart
    –Adipose in thick layer in some places
    –Coronary blood vessels travel through this layer
  14. –Smooth inner lining of heart and blood vessels
    –Covers the valve surfaces and is continuous with endothelium of blood vessels
  15. –Layer of cardiac muscle proportional to work load
    –Muscle spirals around heart which produces wringing motion
  16. •Two superior chambers
    •Receive blood returning to heart
    •Auricles (seen on surface) enlarge chamber

    Which two chambers?
    Right and left atria
  17. •Two inferior chambers
    •Pump blood into arteries

    Which two chambers
    Right and left ventricles
  18. —control blood flow between atria and ventricles
    Atrioventricular (AV) valves
  19. The Valves:
    has three cusps
    Right AV valve (tricuspid valve)
  20. The Valves:
    has two cusps
    Left AV valve has (mitral or bicuspid valve)
  21. –cords connect AV valves to papillary muscles on floor of ventricles
    •Prevent AV valves from flipping inside out or bulging into the atria when the
    ventricles contract
    Chordae tendineae
  22. —control flow into great arteries; open and close because of blood flow and pressure
    Semilunar valves
  23. –in opening between right ventricle and pulmonary trunk
    Pulmonary semilunar valve
  24. –in opening between left ventricle and aorta
    Aortic semilunar valve
  25. What are the two semilunar valves?
    Pulmonary and Aortic semilunar valves
  26. What are the two (AV) valves?
    • –Right AV valve (tricuspid valve)
    • –Left AV valve (mitral or bicuspid valve)
Card Set
Ch 19 Heart 1
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