Question

good Noon❣
✏What is Open circulation?
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Answer 1

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Open Circulation.....✒

Open circulatory systems are systems where blood, rather than being sealed tight in arteries and veins, suffuses the body and may be directly open to the environment at places such as the digestive tract.

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Answer 2

Answer:

Open circulation happens when there are no vessels to contain the blood and it flows freely through the cavities of the body.