The salivary glands in a cockroach open into the ..........

What is the function of Malpighian tubules 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.

Which accessory digestive gland is found in a cockroach?

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

Which of the following statements is incorrect?