Circulation paths should be as long as possible to encourage exercise.

• A. Sometimes
• B. True
• C. Not specified
• D. False

Answer: (D)

The main idea is that circulation works best when resistance to flow is kept manageable. Making the circulation path longer adds friction and more tissue to push blood through, which raises the energy the heart must expend and can slow flow. In other words, longer routes don’t help; they make the system harder to drive, especially during exercise when the body needs rapid, efficient blood delivery to working muscles.

During exercise, the body adapts to improve circulation by increasing cardiac output, developing more capillaries in active tissues, and improving venous return. These changes enhance delivery without needing longer circulation paths. So the statement isn’t accurate—efficient circulation relies on optimizing flow, not maximizing path length.