First slide

Classification of Animals

Question

Which of the following has closed circulatory system?

Easy

A

Amphioxus
B

Balanoglossus
C

Limulus
D

Echinus

Solution

Circulatory system of chordates (e.g., Amphioxus) is closed type (except urochordates).
Balanoglossus (Hemichordata), Limulus (Arthropoda) and Echinus (Echinodermata) have open circulatory system.

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