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Questions and Answers

What is the primary function of the thin wall of the heart?

Separates the left atrium from the left ventricle preventing blood from flowing backwards
Easy expansion to accommodate blood coming from the lungs (correct)
Bring oxygen rich blood form the lungs back to the heart
For decoration

What is the primary function of the four pulmonary veins?

Have heavier thicker walls and smaller lumens
Bring back oxygen rich blood from the lungs back to the heart (correct)
Carry oxygen rich blood AWAY from the heart
They are known as the natural pacemaker

What is the primary function of the mitral valve?

Prevent backflow of blood from the left ventricle into the left atrium (correct)
Regulate blood flow from the right ventricle into the right atrium
Promote backflow of blood from the left ventricle
Control blood flow from the aorta into the left ventricle

What are two prime functions of the left atrium?

Contracts to push blood through the mitral valve into the left ventricle (A) Signup and view all the answers

Which of the following statements about the pulmonary veins is true?

They have thinner walls and larger lumens compared to the arteries (C) Signup and view all the answers

Which of the following is a feature of the arteries?

All of the above (D) Signup and view all the answers

Which of the following is a feature of veins?

Have heavier, thicker walls and smaller lumens (D) Signup and view all the answers

What is the primary function of the semi-lunar valve?

Prevent backflow from pulmonary artery into right ventricle (C) Signup and view all the answers

Which of the following is not a component of the circulatory system?

Lymph nodes (C) Signup and view all the answers

What is the function of the pulmonary circulation?

Carry blood to and from the lungs (B) Signup and view all the answers

Which of the following is a component of the systemic circulation?

Delivers oxygen and nutrients to body tissues (D) Signup and view all the answers

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