In a cockroach,from where do the hepatic caecae arise?

Describe the respiratory system of a cockroach.

Which of the following does not participate in excretion in cockroach?

Match the following columns regarding the reproductive system of a cockroach:

Column-$I$	Column-$II$
$P$. Testes	$I$. $2$nd to $6$th segments
$Q$. Mushroom gland	$II$. $6$th to $7$th segments
$R$. Ovaries	$III$. $6$th segment
$S$. Seminal vesicles	$IV$. $4$th to $6$th segments

The figure given below shows the alimentary canal of a cockroach with a few structures labelled as $1, 2, 3$ and $4$. Identify the structure which is also called proventriculus and helps in grinding the food particles.

Haemolymph is the term used for the blood of the organism having