Which of the following organisms possesses high and regular blood pressure?

In cockroaches,the excretory product is ........ .

The figure given below shows the male reproductive system of a cockroach. Identify $P$,$Q$,and $R$.

The figure given below shows the reproductive system of a female cockroach. The correct labellings indicated by alphabets $(A, B, C)$ are respectively:

Match List-$I$ with List-$II$ related to the digestive system of a cockroach.

List-$I$	List-$II$
$A$. The structures used for storing of food	$I$. Gizzard
$B$. Ring of $6-8$ blind tubules at junction of foregut and midgut.	$II$. Gastric Caeca
$C$. Ring of $100-150$ yellow coloured thin filaments at junction of midgut and hindgut.	$III$. Malpighian tubules
$D$. The structures used for grinding the food.	$IV$. Crop

Choose the correct answer from the options given below:

Which of the following parts is not associated with the nerve ring in a cockroach?