Question

question 59 (0.5 points)
the _____ pumps __ into the _____.
○ right ventricle; oxygen poor blood; pulmonary trunk
○ left ventricle; oxygen rich blood; pulmonary veins
○ right ventricle; oxygen rich blood; superior vena cava
○ left ventricle; oxygen poor blood; pulmonary trunk

Explanation:

To solve this, we recall the circulatory system: The right ventricle pumps deoxygenated (oxygen - poor) blood into the pulmonary trunk, which takes it to the lungs for oxygenation. Let's analyze each option:

• Option 1: right ventricle pumps oxygen - poor blood into pulmonary trunk. This matches the pulmonary circulation.
• Option 2: Left ventricle pumps oxygen - rich blood into the aorta (not pulmonary veins), so this is wrong.
• Option 3: Right ventricle has oxygen - poor blood, not rich, and superior vena cava brings blood to the right atrium, not from the right ventricle, so wrong.
• Option 4: Left ventricle has oxygen - rich blood, and pulmonary trunk is connected to the right ventricle, so wrong.

Answer:

A. right ventricle; oxygen poor blood; pulmonary trunk