First slide

Circulatory Pathways

Question

Which of the following have a closed circulatory system?

Easy

A

Prawn and fish
B

Snail and shark
C

Earthworm and whale
D

Crocodile and chiton

Solution

Annelids (e.g., earthworm), cephalopod molluscs, cephalochordates and vertebrates (e.g., whale) have a closed circulatory system.
The circulatory system is of open type in prawns (Arthropoda), snails and chitons (Mollusca).

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