Which of the following have "ommatidia" as unit of eye

Mention the function of the following

Malpighian tubules

Cescribe the Respiratory cavities of cockroach.

Which of the following statement(s) is/are correct regarding excretory system of cockroach?

$(i)$ Excretion is performed by malphigian tubules.

$(ii)$ They absorb nitrogenous waste products and convert them into uric acid which is excreted out through hindgut.

$(iii)$ In addition, fat body, nephrocytes and urecose glands also help in excretion.

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 mid gut.

Which accessory digestive gland found in cockroach?