General Anatomy Circulatory System
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Questions and Answers

Which part of the heart is responsible for initiating the blood flow in the blood vascular system?

  • Epicardium
  • SA node (correct)
  • Endocardium
  • Myocardium

Which structure is a network of drainage vessels for returning excess extravascular fluid, the lymph, to the blood circulatory system?

  • Trabeculae carnae
  • Lymph Vascular System (correct)
  • Tricuspid valve
  • Pulmonic valve

What part of the heart is primarily responsible for immunological screening?

  • Tunica Media
  • SA node
  • Aortic valve
  • Lymph Vascular System (correct)

Which part of the heart is known as the heart's natural pacemaker?

<p>SA node (C)</p> Signup and view all the answers

What is the primary function of the Trabeculae carnae in the heart?

<p>Increase surface area for papillary muscles (D)</p> Signup and view all the answers

Which part of the heart is responsible for transporting lymph to the lymph nodes for immunological screening?

<p>Lymph Vascular System (D)</p> Signup and view all the answers

What is the main function of the microcirculation or microvasculature?

<p>Exchange of gases, fluids, nutrients, and metabolic waste products (B)</p> Signup and view all the answers

Which type of capillaries forms an interconnected network where the exchange of gases, fluids, nutrients, and metabolic waste products occurs?

<p>Continuous capillaries (B)</p> Signup and view all the answers

What is the function of venules in the circulatory system?

<p>Collect excess interstitial fluid called lymph from tissue spaces (D)</p> Signup and view all the answers

What is the main role of veins in the circulatory system?

<p>Transport blood from the venules back to the heart (A)</p> Signup and view all the answers

What is the function of lymphatic capillaries in the lymphatic vascular system?

<p>Collect excess interstitial fluid called lymph from tissue spaces (C)</p> Signup and view all the answers

Which duct drains lymph from the chest wall down to lower extremities in the lymphatic vascular system?

<p>Thoracic duct (C)</p> Signup and view all the answers

What prevents the backflow of blood particularly in small and medium-sized veins?

<p>Valves (B)</p> Signup and view all the answers

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