The primary excretory product in a cockroach is .....

Open circulatory system is not a physiological hindrance in a $Cockroach$ because

Identify the location and function of the following glands in cockroaches:
$(i)$ Conglobate gland
$(ii)$ Collateral gland

Which is the correct sequence of labeling for the given figure?

Which of the following statement$(s)$ is/are correct about the nervous system of a cockroach?
$(i)$ It consists of a series of fused segmentally arranged ganglia joined by paired longitudinal connectives on the ventral side.
$(ii)$ There are six ganglia lie in the thorax,and three in the abdomen.
$(iii)$ The sense organs are antennae,eyes,maxillary palps,labial palps,and anal cerci,etc.
$(iv)$ Each eye consists of about $5000$ hexagonal ommatidia.

In which part of the cockroach is the maximum digestion observed?