Excretion in cockroach takes place by
(2) parotid gland
(3) coxal glands
(4) malphighian tubules
(4) In Cockroach, excretion is mainly performed by one or two pairs of malpighian tubules. One of this pair opens into the middle region of intestine and other pair of coxal glands are located in prosoma and opens at bases of fifth walking legs.