Biology · Circulatory System
What is the key characteristic of a closed circulatory system?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Blood is colorless
- 2Blood flows within closed vessels and capillaries✓
- 3There is no heart
- 4Blood flows directly into body cavities
Correct answer
Blood flows within closed vessels and capillaries
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