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Cardiac Anatomy Flashcards

6 cards from real ECG practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 6 Cardiac Anatomy flashcards as text

  1. Which chamber of the heart has the thickest muscular wall?

    Answer: Left ventricle

    The left ventricle has the thickest wall because it must generate enough pressure to pump blood throughout the entire systemic circulation.

  2. What is the normal pacemaker of the heart?

    Answer: Sinoatrial (SA) node

    The SA node, located in the right atrium, generates electrical impulses at 60-100 beats per minute and is the heart's natural pacemaker.

  3. Which valve separates the left atrium from the left ventricle?

    Answer: Mitral valve

    The mitral (bicuspid) valve has two leaflets and prevents backflow from the left ventricle into the left atrium during systole.

  4. What is the function of the coronary sinus?

    Answer: Collects deoxygenated blood from cardiac veins

    The coronary sinus is a large vein that collects deoxygenated blood from the cardiac veins and empties it into the right atrium.

  5. Which structure delays electrical impulses between the atria and ventricles?

    Answer: AV node

    The AV node provides a critical delay of about 0.1 seconds, allowing the atria to finish contracting before the ventricles begin.

  6. Which layer of the heart wall contains contractile muscle tissue?

    Answer: Myocardium

    The myocardium is the thick middle layer composed of cardiac muscle cells responsible for heart contraction.

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