Pig Heart Anatomy Flashcards
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Pig Heart Anatomy Flashcards

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Questions and Answers

What is the first step in determining the orientation of the heart?

  • Determine the large cut's location (correct)
  • Locate the pulmonary veins
  • Identify the left atrium
  • Visualize the aorta
  • Where does the aorta open?

    Posterior

    What characterizes the superior vena cava?

    Points more superior-anteriorly

    What vessels branch from the pulmonary trunk?

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

    What distinguishes the inferior vena cava?

    <p>Points inferior-posteriorly</p> Signup and view all the answers

    Which ventricle is thicker-walled?

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

    What do pulmonary veins connect to?

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

    Describe the pulmonary trunk.

    <p>A large vessel extending from the right ventricle</p> Signup and view all the answers

    What notable feature does the aorta have?

    <p>Most conspicuous vessel</p> Signup and view all the answers

    Study Notes

    Heart Orientation

    • The orientation of the heart is identified by a large cut on the anterior surface, positioned slightly to the right of mid-sagittal.
    • The aorta opens towards the posterior side of the heart.

    Vena Cava

    • Composed of large, collapsed veins located on the right-posterior side of the heart.
    • The superior vena cava is oriented superior-anterior and easily identified due to the absence of nearby large vessels.
    • The inferior vena cava is oriented inferior-posteriorly, often near the pulmonary veins, and can be identified by probing from the superior to inferior vena cava.

    Pulmonary Trunk

    • A prominent vessel that rises from the right ventricle, extending posterio-laterally across the top of the heart.
    • May either show an opening or branch into pulmonary arteries depending on the specimen cut.
    • Identification can be done by passing a probe through the pulmonary semilunar valve from the right ventricle.

    Aorta

    • The most noticeable vessel on the heart, typically not collapsed, with its opening directed posteriorly or superiorly before the arch.
    • Features openings on the superior surface for the brachiocephalic and subclavian arteries.
    • Tracing the aorta backwards leads into the left ventricle, passing through the aortic semilunar valves.

    Pulmonary Veins

    • Composed of several collapsed veins located on the posterior side of the heart, connecting to the left atrium.
    • Can be difficult to visualize unless held open by a probe or pin, similar to the vena cavas.

    Ventricles

    • The left ventricle has thicker walls compared to the right ventricle, which is evident as it occupies the posterior and inferior sections of the heart.
    • The right ventricle is positioned more anterior-superior.
    • The main anterior cut exposes both ventricles.

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    Description

    Explore the intricate anatomy of the pig heart with these flashcards. Each card highlights key features, including orientation and views of the heart, providing a comprehensive understanding of its structure. Ideal for students studying biology and anatomy.

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