Question
Write the differences between:
Open and Closed system of circulation
Open and Closed system of circulation
✓
Answer
Differences between Open and Closed System of Circulation
| S.No. | Open Circulatory System | Closed Circulatory System |
| 1. | The circulatory system in which blood does not flow entirely within closed vessels is called an open circulatory system. | It is a circulatory system in which blood flows through closed vessels. |
| 2. | It remains in contact with blood vessels. | It does not remain in contact with tissues. |
| 3. | Blood flow is slow. | Blood flow is fast. |
| 4. | Respiratory pigment (if present) remains dissolved in plasma. RBCs are absent. | Respiratory pigment may be present, mostly found in RBCs. |
| Examples: Insects, spiders, cockroaches, crabs, etc. | Examples: Humans, rabbits, turtles, etc. |
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