In cockroach, identify the parts of the foregut in correct sequence
Arthrodial membrane is present in..
Explain reproductive system of male cockroach
The given figure shows open circulatory system of cockroach. Identify the structure that facilitate the flow of haemolymph by its contraction and relaxation
The given figure shows the digestive system of cockroach with few structures marked as $A , B , C$ and $D$.
Identify structures $A$ to $D$.