Anatomy of the Heart Ventricles
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Questions and Answers

According to the modern view, which of the following statements is true?

  • Blood in the ventricle and truncus arteriosus is completely mixed. (correct)
  • The spiral valve in the truncus arteriosus directs blood into different arches.
  • Pure and impure blood in the heart do not mix.
  • The inter-auricular septum and spiral valve in the truncus arteriosus are functional.

What is the function of the inter-auricular septum and spiral valve in the truncus arteriosus according to the modern view?

  • They direct the flow of pure and impure blood into different arches.
  • They have become functionless in the frog. (correct)
  • They prevent the mixing of blood from the right and left auricles.
  • They are functional and play a crucial role in blood flow.

What is the difference between the blood received from the skin and buccal cavity, and the blood received from the lungs?

  • There is no difference in the oxygenation levels of the blood. (correct)
  • The blood from the skin and buccal cavity is more oxygenated than the blood from the lungs.
  • The blood from the skin and buccal cavity is deoxygenated, while the blood from the lungs is oxygenated.
  • The blood from the skin and buccal cavity is less oxygenated than the blood from the lungs.

Which of the following statements about arteries is true?

<p>They carry blood away from the heart to different parts of the body under high pressure with great speed. (D)</p> Signup and view all the answers

What is the function of the semilunar valves in veins?

<p>They prevent the backflow of blood away from the heart. (B)</p> Signup and view all the answers

Which of the following statements about veins is false?

<p>They are thick-walled and non-collapsible vessels. (D)</p> Signup and view all the answers

What is the purpose of the three layers in the wall of blood vessels?

<p>To provide structural support and allow for the contraction and relaxation of the vessels. (B)</p> Signup and view all the answers

Which of the following is the correct order of the layers in the wall of a blood vessel, from outermost to innermost?

<p>Tunica externa, tunica media, tunica interna (C)</p> Signup and view all the answers

What is the function of the auricles in the frog's heart?

<p>To pump blood to the ventricle. (C)</p> Signup and view all the answers

What is the role of the ventricle in the frog's heart?

<p>To receive blood from the auricles and pump it to the body. (B)</p> Signup and view all the answers

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