Coronary Arteries and Veins Overview
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Questions and Answers

Which artery is primarily responsible for supplying blood to the front and bottom of the left ventricle?

  • Left Anterior Descending artery (LAD) (correct)
  • Posterior descending artery
  • Circumflex artery
  • Right marginal artery

    • What is the role of collateral circulation in the coronary arteries?

  • To open new pathways for blood flow when main arteries are blocked (correct)
  • To supply blood to the brain during a heart attack
  • To increase blood pressure in the coronary system
  • To enhance blood flow purely during rest periods

    • Which of the following statements accurately describes the origin of the coronary arteries?

  • They come from the left atrium.
  • They arise from the pulmonary artery.
  • They branch from the brachiocephalic trunk.
  • They originate from the ascending aorta. (correct)

    • The right coronary artery supplies blood to all of the following structures EXCEPT:

    <p>Left atrium</p> Signup and view all the answers

    What effect does coronary artery disease have on collateral circulation?

    <p>It promotes the enlargement and activation of collateral vessels.</p> Signup and view all the answers

    Study Notes

    Coronary Arteries and Veins

    • The heart receives blood through coronary arteries.
    • Coronary arteries originate from the aorta.
    • The right coronary artery (RCA) supplies blood to the right atrium, right ventricle, part of the left ventricle and the back of the septum.
    • The left coronary artery (LCA) divides into two branches: the circumflex artery and the left anterior descending artery (LAD).
    • The circumflex artery supplies the left atrium and the side and back of the left ventricle.
    • The LAD supplies the front and bottom of the left ventricle and the front of the septum.
    • Coronary veins collect deoxygenated blood from the heart muscle.
    • These veins return the blood to the right atrium.
    • The right coronary artery supplies the right atrium, right ventricle, bottom of both ventricles, and back of the septum.
    • The left circumflex artery supplies the left atrium and left ventricle.
    • The left anterior descending artery supplies the right ventricle, left ventricle, and interventricular septum.
    • The right marginal artery supplies the right ventricle and apex.
    • The left marginal artery supplies the left ventricle.

    Collateral Circulation

    • A network of tiny blood vessels exists in the heart.
    • Under normal conditions, this network is not open.
    • When coronary arteries are narrowed (coronary artery disease), collateral vessels enlarge and become active.
    • This allows blood to flow around the blocked artery, protecting the heart tissue from injury.

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    The Heart - Coronary Arteries and Veins PDF

    Description

    This quiz explores the function and anatomy of coronary arteries and veins. Learn how the heart receives oxygenated blood and returns deoxygenated blood through various arteries such as the right coronary artery and left coronary artery branches. Test your knowledge of their roles in cardiovascular health.

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