Which type of circulation does the right side of the heart provide?

Question

BlackTom AI · Accepted Answer

The right side of the heart pumps deoxygenated blood to the lungs, providing pulmonary circulation.

1. Relevant knowledge points and concepts
- The heart has two functional pumps: the right side (right atrium and right ventricle) and the left side (left atrium and left ventricle).
- Pulmonary circulation: blood flow between the heart and lungs for gas exchange (CO2 out, O2 in).
- Systemic circulation: blood flow from the heart to the rest of the body (organs, tissues).
- Structural differences: the right ventricle is thinner-walled and operates at lower pressure because pulmonary vascular resistance is low compared with systemic vascular resistance.

2. Complete reasoning process, step by step
- Venous (deoxygenated) blood returns from the body via the superior and inferior vena cavae into the right atrium.
- Blood passes through the tricuspid valve into the right ventricle.
- The right ventricle contracts, ejecting blood through the pulmonary valve into the pulmonary trunk and pulmonary arteries.
- Pulmonary arteries carry blood to the lungs where gas exchange occurs; oxygenated blood returns via pulmonary veins to the left atrium.
- This closed loop (right heart → lungs → left heart) is the pulmonary circulation.

3. Calculations or intermediate steps
- No numerical calculations are required for this classification question. The stepwise anatomical route above serves as the intermediate logical steps.

4. Why the correct answer is correct
- Because the right heart specifically sends blood to the lungs for oxygenation, its function exactly matches the definition of pulmonary circulation.

5. Why other options are incorrect
- Systemic: refers to the left heart pumping oxygenated blood to the body, not the right heart.
- Extremity: not a standard name for one of the two main circulatory circuits; it describes a region, not the heart’s pump function.
- Cerebral: refers to blood flow to the brain only, a regional branch of systemic circulation, not the primary circuit of the right heart.

6. Conclusion
- The correct answer is "pulmonary," which matches the provided answer.

Which type of circulation does the right side of the heart provide?单项选择题

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