Which statement best expresses the main idea of the passage?
AThe heart directs blood through connected routes to the lungs and body.✓ Correct
The route joins the lung trip with circulation to the rest of the body.
BThe lungs pump blood directly to every organ.✗ Incorrect
The passage assigns pumping from the heart to its ventricles.
CThe heart receives blood only after it has gained oxygen.✗ Incorrect
Blood also returns from the body with little oxygen.
DThe upper chambers send blood directly to the lungs.✗ Incorrect
The upper chambers pass blood into lower chambers.
Answer
A. The heart directs blood through connected routes to the lungs and body.
Rationale
The passage traces a connected journey through the heart, lungs, and body. Its chamber details show how the route works.
RememberUse the passage to distinguish its central point from a single detail or an unsupported claim.
Sources
Sources marked “Adapted from” are licensed under CC BY 4.0. We changed the material: its facts are rewritten into an original question, answer options and rationale. The original authors and publishers do not endorse SwipeExam.
Review: Introduction to the Cardiovascular SystemSEER Training Modules, National Cancer Institute · License: US government work (public domain) · Retrieved · Review: Introduction to the Cardiovascular System
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