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Answers
Open circulatory system
Open circulation is found in invertebrates like prawn, insects, and molluscs.
1. Blood flows through open spaces called lacunae and sinuses
2. Blood flows at a very slow velocity
3. Body cavity is filled with blood (Haemocoel*)
4. Internal organs are bathed by blood
5. Blood takes long time to complete
6. Supply and elimination of materials are very slow
7. Exchange of materials takes place between blood and sinuses
8. Blood flow cannot be regulated
Closed circulatory system
Invertebrates , the heart and blood vessels form a closed system
1. Blood flows through closed vessels
2. Blood flows at a very high velocity
3. Haemocoel is absent
4. Internal organs are not in direct contact with blood
5. Blood takes short time to complete
6. Supply and elimination of materials are very rapid
7. Exchange of materials between blood and tissues takes place through the capillaries
8. Blood flow can be regulated
* Haemocoel: Is the body cavity in open circulatory system
Answer:h
Explanation: