Question
Biology Question on Kingdom Animalia
Which one of the following has an open circulatory system?
A
Pheretima
B
Periplaneta
C
Hirudinaria
D
Octopus
Answer
Periplaneta
Explanation
Solution
Periplaneta is commonly known as a cockroach, and it has an open circulatory system. In an open circulatory system, the circulatory fluid (hemolymph) is not confined to vessels but bathes the body's tissues directly.
So, the correct option is (B): Periplaneta