Card Set Information

2015-02-06 00:22:32
anatomy heart
studying the heart
Show Answers:

  1. diastol-
  2. systol-
  3. myo-
  4. cardi-
  5. What is the function of the cardiovascular system?
    To carry oxygen and nutrients to all the cells in the body and picks up the waste.
  6. Describe the precise location of the heart.
  7. The heart is enclosed by a double-layered ______.
  8. What is the function of the fluid in the pericardial space?
    To reduce friction
  9. Describe the pathological events of pericarditis.
    Inflammation of the pericardium due to bacterial infection, produces adhesions that attach the layers of the pericardium to each other.
  10. Epicardium secretes _____ ______ into the pericardial cavity.
    serous fluid
  11. Describe: endocardium
    lines the heart and blood vessels
  12. Describe: myocardium
    pumps the blood
  13. Describe: epicardium
    protects the heart by reducing friction
  14. List the chambers of the heart.
    • Left & Right Atrium
    • Left & Right Ventricles
  15. What vessels bring blood to the right atrium?
    Superior & Inferior Vena Cavae
  16. What vessels bring blood to the left atrium?
    Pulmonary Veins
  17. What is mitral valve prolapse?
    Valves do not close all the way allowing blood to back flow.
  18. The cells of the heart are supplied with blood via the _______ ________.
    coronary arteries
  19. What happens when the heart muscle is deprived of oxygen?
    causes pain
  20. Compare myocardial infarction and angina pectoris.
    • myocardial infarction is a heart attack
    • angina pectoris is the tightening and pain leading up to a heart attack.
  21. What events make up a cardiac cycle?
    atria contracts, ventricles relax. vice versa
  22. What produces the heart sounds heard with a stethoscope?
    vibrations of the valves closing
  23. Describe the characteristics of cardiac muscle fibers.
    They connect in branching networks, stripped
  24. Trace an impuse through the cardiac conduction system.
    S-A node -> A-V node -> A-V bundle -> Bundle of His -> Bundle branches -> Purkinje fibers -> Ventricular syncytium
  25. A recording of electrical changes in the myocardium is a(n) _______________________.
    electrocardiogram, ECG
  26. P Wave-
    atricular contraction
  27. QRS Wave-
    ventricules contract
  28. T Wave-
    ventricule muscle relaxes
  29. How is the heart regulated by autonomic reflexes?
    sympathetic nervous system can cause the heart to speed up. parasympathetic nerves can cause the heart to slow down.
  30. How is the heart affected by potassium and calcium?
    • Potassium decreases the rate and forces of contractions
    • calcium increases heart actions