Exam 5

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Shontae
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183116
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Exam 5
Updated:
2012-11-12 01:38:43
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Ch21
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Exam 5 Ch. 21
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  1. Complete the senctece.
    ____ must stay in constant motion to maintain ________.
    Blood, homeostasis
  2. Describe a CLOSED CIRCUIT.
    oxygentated blod and dexoygenated blood doesn't mix
  3. Describe the PULMONARY CIRCUIT.
    • closed circuit
    • carries CO2 rich blood
    • to lungs
  4. Describe the SYSTEMIC CIRCUIT.
    • closed circuit
    • transports O2 rich blood
    • to body
  5. What are the ATRIA for?
    collecting blood returning to the heart
  6. What are the VENTRICLES for?
    discharge blood into vessels to leave the heart
  7. What is the PERICARDIUM?
    serous membrane lining pericardial cavity that surrounds heart
  8. What is the VISCERAL PERICARDIUM?
    • simple squamous
    • LCT
    • covers outer surface of heart
  9. What is the function of the VISCERAL PERICARDIUM?
    lubricate serousmembrane to prevent friction from heart beat
  10. What is the PARIETAL PERICARDIUM?
    • lines inner surface of pericardial sac
    • bag-like, loosely arounf heart
    • continuous with pericardium
    • 2 layer
  11. What is the function of the PERICARDIAL SAC?
    prevent the heart from expanding too much
  12. Describe the position of the heart.
    • slightly to left
    • at oblique angle
    • rotated left
  13. Describe the FIBROUS SKELETON.
    • FCT
    • 4 valves
    • does not conduct electrical impulse
  14. What are the functions of the FIBROUS SKELETON?
    atria and ventricles contract separately because of lack of myocardium
  15. How is an electriacl impulse conducted through the AV NODE?
    • 1 AV node in RT atrium gets signal from atria
    • 2 passes it to ventricular septum
    • 3 initiates ventricular contraction
  16. What is the PATHWAY of BLOOD through the <3?
    • 1blood comes in from body         9pulmonary veins
    • 2right atrium                                10left atrium
    • 3tricuspid valve                            11mitral valve
    • 4right ventricle                             12left ventricle
    • 5pulmonary valve                         13lungs
    • 6pulmonary trunk                         14body
    • 7R&L pulmonary arteries             15venae cavae
    • 8lungs                                            16<3
  17. Describe of the CUSPS of the TRICUSPID VALVE.
    • 3
    • held in place by chordae
    • anchored by papillary muscles
  18. What is the LUB sound of the heart?
    closing of AV valves when ventricles contract
  19. What is the DUP sound of the heart?
    semiulnar valves parachute open and seal back to entrance to ventricles
  20. Describe the CORONARY CIRCUIT.
    • 1st thing to come of aorta
    • 1st supplied with blood
    • arises from ascending aorta
  21. How does the CORONARY CIRCUIT return to the heart?
    through the great cardiac vein
  22. How does the CORONARY CIRCUIT enter the RT ATRIUM?
    through the coronary sinus

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