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Question
Write the differences between open and closed system of circulation
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Solution
| Open system of circulation | Closed system of circulation | |
| 1. | Blood flow via the sinuses' exposed tissue spaces. | Blood flows through blood vessels, which are closed tubes with a distinct wall. |
| 2. | Blood and tissue cells come into intimate contact. | Tissue cells are not in direct contact with the blood. |
| 3. | Direct material exchange takes place between tissue cells and blood cells. | Tissue fluid facilitates the exchange of materials between blood and tissue cells. |
| 4. | There is virtually little blood flow. | The blow flow is really quick. |
| 5. | There are no red corpuscles and any respiratory pigment that may be present dissolves in the plasma. | Although respiratory pigment is present and has the potential to disintegrate in plasma, it is typically retained in red blood cells. |
| 6. | Occur in most molluscs and arthropods. | Occur in vertebrates and annelids. |
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