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प्रश्न
Compare closed and opened circulatory system.
उत्तर
1. Closed circulatory system:
- The circulation in which blood is present inside the blood vessels is called closed circulatory’ system
- It is found in higher organisms, e.g. annelids, cephalochordates and vertebrates.
2. Open circulatory system:
- The circulation in which blood remains filled in tissue spaces due to the absence of blood vessels is called open circulatory system
- It is found in lower organisms. e.g. arthropods, molluscs and echinoderms.
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