Question
Write the differences between:
Open and Closed system of circulation.
Open and Closed system of circulation.
| | Open system of circulation | | Closed system of circulation |
| 1. | In this system, blood is pumped by the heart, through large vessels, into body cavities called sinuses. | 1. | In this system, blood is pumped by the heart, through a closed network of vessels. |
| 2. | The body tissues are in direct contact with blood. | 2. | The body tissues are not in direct contact with blood. |
| 3. | Blood flows at low pressure. Hence, it is a slower and less efficient system of circulation. | 3. | Blood flows at high pressure. Hence, it is a faster and more efficient system of circulation. |
| 4. | The flow of blood is not regulated through the tissues and organs. | 4. | The flow of blood can be regulated by valves. |
| 5. | This system is present in arthropods and mollusks. | 5. | This system is present in annelids, echinoderms, and vertebrates. |
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