Left Atrium and Ventricle
26 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which part of the heart forms the superior part of the left border of the heart and overlaps the root of the pulmonary trunk?

  • The right atrium
  • The right auricle
  • The left atrium
  • The left auricle (correct)

    • Which veins enter the smooth-walled left atrium?

  • Superior and inferior vena cava
  • Pulmonary trunk and aorta
  • Right and left pulmonary veins (correct)
  • Right and left coronary veins

    • What does the semilunar depression in the interatrial septum indicate?

  • The right atrium
  • The floor of the oval fossa (correct)
  • The valve of the oval fossa
  • The left atrium

    • What forms most of the base of the heart?

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

    Which chamber of the heart contains an interatrial septum that slopes posteriorly and to the right?

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

    Where does the left atrium discharge the oxygenated blood it receives from the pulmonary veins?

    <p>Into the left ventricle</p> Signup and view all the answers

    Which part of the left atrium contains pectinate muscles?

    <p>The smaller muscular auricle</p> Signup and view all the answers

    How does the wall thickness of the left atrium compare to that of the right atrium?

    <p>The left atrium has a slightly thicker wall than the right atrium.</p> Signup and view all the answers

    Through which orifice does the left atrium discharge its blood into the left ventricle?

    <p>Left AV orifice</p> Signup and view all the answers

    Which ventricle performs more work due to the higher arterial pressure in the systemic circulation?

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

    What is the thickness ratio between the walls of the left ventricle and the right ventricle?

    <p>2:1</p> Signup and view all the answers

    What covers the walls of the left ventricle?

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

    Which ventricle has a conical cavity that is longer?

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

    Which chamber has larger anterior and posterior papillary muscles?

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

    What is the name of the smooth-walled, non-muscular outflow part of the left ventricle?

    <p>Aortic vestibule</p> Signup and view all the answers

    What valve guards the left atrioventricular orifice?

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

    Where is the aortic orifice located in the left ventricle?

    <p>Posterior part</p> Signup and view all the answers

    What structure attaches the cusps of the aortic valve to the fibrous ring surrounding the aortic orifice?

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

    Which valve is located posterior to the sternum at the level of the 4th costal cartilage?

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

    What is the function of the tendinous cords in the mitral valve?

    <p>To prevent the cusps from being forced into the left atrium</p> Signup and view all the answers

    What is the significance of the reversal of flow around the anterior cusp of the mitral valve?

    <p>It causes a change in direction of the bloodstream</p> Signup and view all the answers

    Where is the semilunar aortic valve located?

    <p>Posterior to the left side of the sternum at the level of the 3rd intercostal space</p> Signup and view all the answers

    What supports the mitral valve and allows it to resist the pressure developed during contractions of the left ventricle?

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

    Which of the following statements about pectinate muscles is true?

    <p>They help the right atrium dilate without much wall stress.</p> Signup and view all the answers

    What is the function of pectinate muscles in the right atrium?

    <p>Increase the surface area of the atrial chamber</p> Signup and view all the answers

    Which chamber of the heart has less developed pectinate muscles?

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

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser