What opens in ejaculatory duct of cockroach?
Vas deferens
Oesophagus
Salivary duct
Oviduct
In cockroach, which of the following is the principal motor centre?
Mention structure of heart and path of transport in cockroach.
Function of Malpighian tubules.
Identify $X$ and $Y$
In male cockroaches, sperms are stored in which part of the reproductive system?