Anatomy of the Heart: Left Atrium and Left Ventricle Features
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Questions and Answers

Which chamber of the heart forms the apex?

  • Left ventricle (correct)
  • Right atrium
  • Right ventricle
  • Left atrium

    • In the thoracic cavity, which structure forms the inferior border of the heart?

  • Left ventricle
  • Right atrium
  • Right ventricle (correct)
  • Left atrium

    • Which landmark does the right atrium align with in relation to the sternum?

  • Inferior border of the heart
  • Diaphragmatic surface
  • Apex
  • Right border of the heart (correct)

    • Where is the right ventricle positioned relative to the sternum?

    <p>Behind and immediately left of it</p> Signup and view all the answers

    Which chamber of the heart forms most of the left border and diaphragmatic surface?

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

    Which of the following is NOT a correct border of the heart?

    <p>Posterior (interventricular septum)</p> Signup and view all the answers

    Which of the following sulci (grooves) does NOT mark the division between the atria and ventricles?

    <p>Interventricular sulci</p> Signup and view all the answers

    Which of the following structures is NOT a feature of the right atrium?

    <p>Chordae tendineae</p> Signup and view all the answers

    Which of the following structures is associated with the right ventricle?

    <p>Septomarginal trabecula (moderator band)</p> Signup and view all the answers

    Which of the following structures is responsible for the inflow of blood into the right atrium?

    <p>Superior vena cava and inferior vena cava</p> Signup and view all the answers

    What is the name of the serous membrane that lines the inner surface of the fibrous pericardium?

    <p>Parietal serous pericardium</p> Signup and view all the answers

    Which of the following structures is located in the posterior mediastinum?

    <p>Esophagus</p> Signup and view all the answers

    What is the name of the recess located between the left atrium and pulmonary veins?

    <p>Oblique pericardial sinus</p> Signup and view all the answers

    What is the clinical significance of the transverse pericardial sinus?

    <p>It allows for temporary ligation of the ascending aorta and pulmonary trunk during cardiac surgery.</p> Signup and view all the answers

    Which of the following is NOT a feature of the right ventricle?

    <p>Mitral valve</p> Signup and view all the answers

    Which structure lies on the posterior side of the heart and forms most of the heart's base?

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

    What is the main clinical implication of blood regurgitated through the mitral valve leading to a dilated left atrium?

    <p>Heart arrhythmia or failure</p> Signup and view all the answers

    Collagenous rings in the heart anchor myocardium & valve cusps and serve as a passageway for conducting system fibers. What is the primary function of these rings?

    <p>Maintain electrical insulation between atria &amp; ventricles</p> Signup and view all the answers

    Which valve has three cusps: anterior, posterior, and septal?

    <p>Pulmonary valve</p> Signup and view all the answers

    Where does the right coronary artery typically originate from?

    <p>Right aortic sinus</p> Signup and view all the answers

    Where is the right atrium positioned in relation to the sternum?

    <p>To the right of the sternum</p> Signup and view all the answers

    What forms the inferior border of the heart?

    <p>Right ventricle</p> Signup and view all the answers

    Which structure contributes to most of the left border and diaphragmatic surface of the heart?

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

    What does the left ventricle form anatomically within the heart?

    <p>Apex</p> Signup and view all the answers

    Which feature is characteristic of the right ventricle?

    <p>Trabeculae carneae</p> Signup and view all the answers

    Which of the following is NOT a feature of the right ventricle?

    <p>Pectinate muscles</p> Signup and view all the answers

    Which chamber of the heart forms the majority of the diaphragmatic (inferior) surface?

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

    Which structure in the right atrium contains the fossa ovalis, a remnant of the fetal foramen ovale?

    <p>Interatrial septum</p> Signup and view all the answers

    The coronary sulcus on the heart's surface marks the division between which two heart chambers?

    <p>Atria and ventricles</p> Signup and view all the answers

    Which of the following is NOT a correct border of the heart?

    <p>Inferior (RV)</p> Signup and view all the answers

    Which of the following is a feature of the right ventricle?

    <p>Presence of the moderator band</p> Signup and view all the answers

    Which surface of the heart is formed primarily by the right ventricle?

    <p>Diaphragmatic surface</p> Signup and view all the answers

    What is the name of the muscular ridge located in the right atrium that separates the venous component from the atrial component?

    <p>Crista terminalis</p> Signup and view all the answers

    Which of the following borders of the heart is formed primarily by the right ventricle?

    <p>Right border</p> Signup and view all the answers

    What is the name of the smooth-walled portion of the right atrium where the venous component (sinus venarum) is located?

    <p>Sinus venarum</p> Signup and view all the answers

    Which of the following structures is NOT a feature of the right ventricle?

    <p>Bicuspid valve</p> Signup and view all the answers

    Which surface of the heart is formed primarily by the left ventricle?

    <p>Inferior (diaphragmatic) surface</p> Signup and view all the answers

    Which of the following structures is responsible for the inflow of blood into the right atrium?

    <p>Both b and c</p> Signup and view all the answers

    What is the primary function of the collagenous rings in the heart?

    <p>All of the above</p> Signup and view all the answers

    Which of the following is NOT a feature of the right atrium?

    <p>Bicuspid valve</p> Signup and view all the answers

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