Which one of the following has an open circulatory system?
Octopus
Pheretima
Periplaneta
Hirudinaria
The mouth parts of cockroach are
In cockroach, identify the parts of the foregut in correct sequence
Describe circulatory system of cockroach.
The given figure shows the digestive system of cockroach with few structures marked as $A , B , C$ and $D$.
Identify structures $A$ to $D$.
What is not present in female cockroach ?