Circulatory System Basics
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Questions and Answers

What causes the 'LUB' sound in the heart?

  • Pumping of blood into the pulmonary arteries
  • Closing of the atrioventricular valves during ventricular contraction (correct)
  • Closing of the valves leading out of the heart
  • Opening of the tricuspid valve
  • Where does deoxygenated blood go after filling the right atrium?

  • Flows into the left ventricle
  • Pumped into the pulmonary veins
  • Transferred to the aorta
  • Moves to the pulmonary arteries (correct)
  • What happens when pressure builds up in the left atrium?

  • Closing of the atrioventricular valves
  • Mitral valve opens (correct)
  • Pulmonary vein contraction
  • Opening of the tricuspid valve
  • What is the function of the pulmonary circulation?

    <p>Exchange carbon dioxide for oxygen in the lungs</p> Signup and view all the answers

    What is the main function of the thinnest blood vessels?

    <p>Exchanging materials between blood and cells</p> Signup and view all the answers

    What is the role of valves in the cardiovascular system?

    <p>Preventing the backward flow of blood</p> Signup and view all the answers

    What is auscultation in medical terms?

    <p>Listening to internal body sounds using a stethoscope</p> Signup and view all the answers

    Who was the first to show that the heart and blood vessels form a continuous closed circulatory system?

    <p>William Harvey</p> Signup and view all the answers

    Which type of circulation involves the blood passing through the blood vessels?

    <p>Closed circulatory system</p> Signup and view all the answers

    In which system does the hemolymph or circulating fluid in invertebrates not pass through enclosed tubes?

    <p>Open circulatory system</p> Signup and view all the answers

    Where does gas exchange take place in an open circulatory system?

    <p>Hemocoel network</p> Signup and view all the answers

    Which component of the circulatory system involves transporting blood away from and back to the heart?

    <p>Blood vessels</p> Signup and view all the answers

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