Which of the following is not a part of the male cockroach reproductive system?

Which of the following statement$(s)$ is/are correct regarding the digestive system of cockroach?
$(i)$ Mouth opens into a short tubular pharynx,leading to a narrow tubular passage called oesophagus.
$(ii)$ Gizzard helps in grinding the food particles.
$(iii)$ $A$ ring of $6-8$ blind tubules called hepatic or gastric caecae is present at the junction of foregut and midgut,which secrete digestive juice.
$(iv)$ At the junction of midgut and hindgut is present another ring of $100-150$ yellow coloured thin filamentous Malpighian tubules which help in removal of excretory products from haemolymph.

Name the blood vessel that arises from the first chamber of the heart in a cockroach.

Consider the following statements regarding cockroach and mark the correct option.
$(i)$ Head is formed by the fusion of $6$ segments.
$(ii)$ Mouth parts are biting and chewing type.
$(iii)$ Crop is the part of midgut.

In which part of the alimentary canal of a cockroach are the cuticular invaginations found?

The body cells in cockroach discharge their nitrogenous waste in the haemolymph mainly in the form of