Refer the given figure of female reproductive system of cockroach and identify the correct labels (marked as $1,2,3$ and 4) which are collectively called genital pouch.
$1\;and\;2$
$1\;and\;3$
$2\;and\;4$
$3\;and\;4$
Complete the following statement :
$(a)$ In cockroach grinding of food particle is performed by ........ .
$(b)$ Malpighian tubules help in removal of ........ .
$(c)$ Hind gut of cockroach is differentiated into ........ .
$(d)$ In cockroach blood vessels open into spaces called ........ .
Body cavity also known as ........ in cockroach.
Select the correct statement regarding Periplanata americana
Select the correct option with respect to cockroaches.
Describe reproductive system of cockroach in detail.