Heart and Coronary Circulation Dissection
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Questions and Answers

What primarily forms the right border of the heart?

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

    • Which structure forms the apex of the heart?

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

    • Which surface of the heart is predominantly made up of the right ventricle?

  • Diaphragmatic surface
  • Base of the heart
  • Sternocostal surface (correct)
  • Inferior surface

    • What is the main component of the base of the heart?

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

    Which part of the heart is located in the inferior border?

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

    Which portion comprises the superior surface of the heart?

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

    What contributes to the left border of the heart?

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

    Which statement about the inferior surface of the heart is correct?

    <p>It is where the heart rests.</p> Signup and view all the answers

    Which structure plays a minimal role in forming the right border of the heart?

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

    What structure is located on the interatrial septum?

    <p>Fossa ovalis</p> Signup and view all the answers

    Which vein opens to the left of the inferior vena caval opening?

    <p>Coronary sinus</p> Signup and view all the answers

    Which of the following structures is identified as part of the posterior atrioventricular groove?

    <p>Great cardiac vein</p> Signup and view all the answers

    The anterior wall incision reveals which vertical structure in the right atrium?

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

    Which artery has its circumflex branch associated with the great cardiac vein?

    <p>Left coronary artery</p> Signup and view all the answers

    Identifying the muscle structures in the right atrium, which of the following is horizontal?

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

    Which pulmonary vein is positioned inferiorly in the left atrium?

    <p>Inferior left pulmonary vein</p> Signup and view all the answers

    What is identified as the smooth portion of the right atrium?

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

    In which area is the inferior left pulmonary vein located?

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

    What connects the interatrial septum to the anterior papillary muscle?

    <p>Modulator band</p> Signup and view all the answers

    What is the function of the sinoatrial node located in the left atrium?

    <p>To initiate the electrical impulses for heart contraction</p> Signup and view all the answers

    Which of the following structures is present in the right ventricle but not in the left ventricle?

    <p>Septomarginal trabecula</p> Signup and view all the answers

    Which aspect of the left ventricle distinguishes it from the right ventricle?

    <p>Thicker muscular wall</p> Signup and view all the answers

    Where is the atrioventricular node located within the heart?

    <p>In the interatrial septum</p> Signup and view all the answers

    Which structure connects the anterior papillary muscle to the interventricular septum?

    <p>Septomarginal trabecula</p> Signup and view all the answers

    What part of the left atrium is described as having a rough surface?

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

    Which component is NOT part of the right ventricle's structures?

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

    What does the mitral valve guard in the heart?

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

    Which of the following statements is true regarding the pulmonary valve?

    <p>It consists of cusps with nodules and lunules.</p> Signup and view all the answers

    Which part of the anatomy facilitates the passage of the right Bundle of His?

    <p>Septomarginal trabecula</p> Signup and view all the answers

    What is the function of the chordae tendineae in the heart?

    <p>They connect the cusps of the tricuspid valve to the papillary muscles.</p> Signup and view all the answers

    Which structure represents the adult form of the embryonic foramen ovale?

    <p>Fossa ovalis</p> Signup and view all the answers

    What distinguishes the right atrium from the left atrium in terms of structure?

    <p>The right atrium is larger but has thinner walls.</p> Signup and view all the answers

    What is the role of the septomarginal trabecula (moderator band) in the heart?

    <p>It connects the interventricular septum to the base of the anterior papillary muscle.</p> Signup and view all the answers

    What does the limbus of the fossa ovalis represent?

    <p>Lower margin of the embryonic secondary septum</p> Signup and view all the answers

    Which valve is known as the right atrioventricular valve?

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

    How does the contraction of the chordae tendineae affect the heart function?

    <p>They prevent the cusps of the valves from everting into the atria.</p> Signup and view all the answers

    What does the crista terminalis separate in the heart?

    <p>The muscular portion of the atrium from the venous inflow area.</p> Signup and view all the answers

    What is primarily located in the interventricular septum?

    <p>Muscular tissue with a small membranous portion</p> Signup and view all the answers

    The coronary sinus is responsible for draining which structures?

    <p>The heart muscle itself.</p> Signup and view all the answers

    Where is the base of the heart located?

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

    Which surface of the heart provides its resting position?

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

    What is the correct term for the moderator band in the heart?

    <p>Septomarginal trabecula</p> Signup and view all the answers

    Which artery is located at the anterior interventricular groove?

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

    What border separates the rough and smooth surfaces of the right atrium?

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

    Which statement regarding the heart's structure is true?

    <p>Left ventricle is thicker than the right ventricle.</p> Signup and view all the answers

    Study Notes

    Heart Structure and Anatomy

    • Right border of the heart is formed by the right atrium.
    • Left border mainly comprises the left ventricle, with contributions from the top of the right ventricle and tip of the left auricle.
    • Inferior border includes the right ventricle with a sliver of the left ventricle at the apex.
    • Sternocostal surface (anterior surface) primarily consists of the right ventricle, along with parts of the left ventricle and right atrium.
    • Apex of the heart is formed by the left ventricle; the base (posterior surface) is dominated by the left atrium with a small portion of the right atrium.
    • The inferior surface (diaphragmatic surface) is primarily formed by both ventricles, predominantly the left.

    Right Atrium

    • Auricle of left atrium serves as a pouch-like extension.
    • Received blood through the superior vena cava, inferior vena cava, and coronary sinus.
    • Smooth portion, sinus venarum, develops from the embryonic sinus venosus.
    • Fossa ovalis represents a remnant of the embryonic foramen ovale, located on the interatrial septum.
    • Main features include:
      • Crista terminalis separating smooth and muscular atrial parts.
      • Openings for the coronary sinus, located left of the inferior vena cava.

    Right Ventricle

    • Pulmonary sinus with cusps of the pulmonary valve, along with important structures:
      • Trabecula carnae and papillary muscles connected to chordae tendineae.
      • Septomarginal trabecula (moderator band) connects to the interventricular septum and allows electrical conduction via the Bundle of His.

    Left Atrium

    • Mainly smooth surfaces, collects blood from the pulmonary veins.
    • Auricle presents a rougher interior opening into the left ventricle, guarded by the mitral valve.

    Left Ventricle

    • Renowned for its thick muscular walls, about three times thicker than that of the right ventricle.
    • Contains structures such as trabecula carnae, papillary muscles, and chordae tendineae essential for valve function.

    Additional Anatomical Features

    • Contracting chordae tendineae prevent tricuspid and mitral valve prolapse during ventricular systole.
    • The interventricular septum is mainly muscular, containing a small membranous section prone to defects.
    • The sinuatrial node (SA node), located at the crista terminalis, is responsible for initiating heartbeats, while the atrioventricular node (AV node) facilitates electrical conduction.

    Test Yourself

    • Multiple choice and true/false questions provided to assess knowledge of heart anatomy, including heart surfaces and structure functions.
    • Assessing the understanding of terms like moderator band, anterior interventricular artery, and the differentiation between smooth and rough atrial surfaces.

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    Related Documents

    Heart and Coronary Circulation (Dissection Video) PDF

    Description

    Explore the anatomy of the heart and its coronary circulation in this dissection video led by Dr. Leslie Asuncion-Viado. This quiz will test your knowledge of the heart structures, including the left ventricle and right atrium, providing a deeper understanding of cardiac anatomy.

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