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

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

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

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

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

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

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

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

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

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

<p>Esophagus (C)</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 (A)</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. (B)</p> Signup and view all the answers

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

<p>Mitral valve (A)</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 (A)</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 (D)</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 (C)</p> Signup and view all the answers

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

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

Where does the right coronary artery typically originate from?

<p>Right aortic sinus (B)</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 (C)</p> Signup and view all the answers

What forms the inferior border of the heart?

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

What does the left ventricle form anatomically within the heart?

<p>Apex (C)</p> Signup and view all the answers

Which feature is characteristic of the right ventricle?

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

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

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

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

<p>Left ventricle (A)</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 (C)</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 (B)</p> Signup and view all the answers

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

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

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

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

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

<p>Diaphragmatic surface (D)</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 (C)</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 (D)</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 (C)</p> Signup and view all the answers

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

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

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

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

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

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

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