AIPMT PRELIMS2006Zoology-Animal Physiology
AIPMT PRELIMS 2006 Zoology Circulatory System MCQ Question
Type: MCQ-conceptual-Medium-Class 11
Which one of the following has an open circulatory system?
A
Pheretima
B
Periplaneta
C
Hirudinaria
D
Octopus
Correct Answer
Option B
Detailed Explanation
Periplaneta, commonly known as the cockroach, has an open circulatory system where the blood is not confined to vessels.
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