First slide

Classification of Animals

Question

Which of the following has open circulatory system?

Easy

A

Pristis
B

Petromyzon
C

Balanoglossus
D

Octopus

Solution

Circulatory system is of open type in Balanoglossus (Hemichordata).
Octopus, Petromyzon and Pristis have closed circulatory system.

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