Question : Closed type of circulation is advanced.

1.	Question : Closed type of circulation is advanced.
Answer» Solution :Closed type of CIRCULATION is found in higher ORGANISMS like prochordates and vertebrates. The invertebrates have open type of circulation except annelids. The closed type of circulation is advanced because blood flows in blood VESSELS. There is a CLEAR separation of oxygenated and DEOXYGENATED blood.

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