Circulatory System Quiz
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Questions and Answers

What is the function of chordae tendineae?

  • Generate electrical impulses
  • Pump blood into the arteries
  • Connect the atria and ventricles
  • Prevent valve prolapse by anchoring the valve cusps (correct)

    • Which arteries branch off the ascending aorta?

  • Coronary arteries (correct)
  • Pulmonary arteries
  • Subclavian arteries
  • Carotid arteries

    • Which valve prevents the backflow of blood into the left ventricle?

  • Aortic valve
  • Mitral valve (correct)
  • Tricuspid valve
  • Pulmonary valve

    • What is the thickest layer of the heart wall?

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

    Which veins drain blood from the brain, head, and neck?

    <p>Jugular veins</p> Signup and view all the answers

    What is the primary function of capillaries?

    <p>Exchange gases and nutrients with tissues</p> Signup and view all the answers

    What prevents overfilling of the heart with blood?

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

    Which chamber of the heart has the thickest wall?

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

    What is the function of the atrioventricular node?

    <p>Sends out a stimulus causing the atria to contract</p> Signup and view all the answers

    What type of blood vessels are the superior and inferior vena cava?

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

    Which blood vessels are part of the pulmonary circuit?

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

    What are the two main components of the circulatory system?

    <p>Cardiovascular system and lymphatic system</p> Signup and view all the answers

    What is the function of the hepatic portal system?

    <p>Connects capillaries of the digestive organs to the liver</p> Signup and view all the answers

    What is the function of the pericardium?

    <p>Protects and anchors the heart</p> Signup and view all the answers

    What bypasses the lungs in fetal circulation?

    <p>Foramen ovale and ductus arteriosus</p> Signup and view all the answers

    How many layers does the heart wall have?

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

    Which valve prevents the backflow of blood into the right ventricle?

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

    What does the right ventricle pump blood into?

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

    Which layer of the heart wall is composed of cardiac muscle?

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

    Which vessels return blood to the heart?

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

    How many chambers does the heart have?

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

    Which chamber of the heart receives oxygen-rich blood from the pulmonary veins?

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

    What is the function of the chordae tendineae?

    <p>Prevents the atrioventricular valves from prolapsing into the ventricles</p> Signup and view all the answers

    What is the function of the sinoatrial (SA) node?

    <p>Sends out a stimulus causing the atria to contract</p> Signup and view all the answers

    Which chamber of the heart receives blood from the superior and inferior vena cava?

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

    Which artery supplies blood to the heart itself?

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

    What prevents the backflow of blood in the heart?

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

    Which valve is located between the left atrium and the left ventricle?

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

    What is the largest artery in the systemic circuit?

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

    Where does the exchange of gases and nutrients occur?

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

    Which vessels carry blood away from the heart?

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

    Which chamber of the heart pumps blood into the aorta?

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

    Study Notes

    Cardiovascular System

    • The cardiovascular system consists of the heart, blood vessels, and blood.
    • It is divided into two main components: cardiovascular system and lymphatic system.

    Heart Structure

    • The heart is located in the thoracic cavity between the lungs.
    • The heart wall has three layers: epicardium (outer layer), myocardium (middle layer composed of cardiac muscle), and endocardium (inner layer).
    • The heart has four chambers: right atrium, left atrium, right ventricle, and left ventricle.

    Heart Function

    • The sinoatrial (SA) node sends out a stimulus causing the atria to contract.
    • The atrioventricular (AV) node generates electrical impulses that signal the ventricles to contract.
    • The right ventricle pumps blood into the pulmonary trunk, while the left ventricle pumps blood into the aorta.
    • The tricuspid valve prevents backflow of blood into the right atrium, and the mitral valve prevents backflow of blood into the left atrium.

    Blood Vessels

    • Arteries carry blood away from the heart, while veins carry blood back to the heart.
    • The superior and inferior vena cava are veins that return blood to the heart.
    • The pulmonary arteries and veins are part of the pulmonary circuit.
    • The hepatic portal system connects capillaries of the digestive organs to the liver.
    • The umbilical arteries and veins carry blood to and from the placenta in fetal circulation.

    Blood Circulation

    • Deoxygenated blood from the body enters the right atrium through the superior and inferior vena cava.
    • Oxygen-rich blood from the pulmonary veins enters the left atrium.
    • The coronary arteries supply blood to the heart itself, and the coronary veins drain blood from the heart.
    • The pulmonary semilunar valve prevents backflow of blood into the right ventricle.

    Fetal Circulation

    • The foramen ovale and ductus arteriosus bypass the lungs in fetal circulation.
    • The umbilical arteries and veins carry blood to and from the placenta.
    • The ductus arteriosus connects the pulmonary artery to the aorta in fetal circulation.

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    Related Documents

    MCQ Anatomy(2) PDF

    Description

    This quiz tests your knowledge of the circulatory system, including blood vessels, heart function, and blood flow. Topics include the role of the atria, ventricles, and blood vessels in the circulatory process.

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