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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?

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

What is the function of the semilunar valves in veins?

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

Which of the following statements about veins is false?

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

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

To provide structural support and allow for the contraction and relaxation of the vessels. (B) 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?

Tunica externa, tunica media, tunica interna (C) Signup and view all the answers

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

To pump blood to the ventricle. (C) Signup and view all the answers

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

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

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