In a cockroach, the primary excretory tubules absorb nitrogenous waste products from the haemolymph and convert them into uric acid. Which specific types of cells line these tubules?

Step-by-step solution

In cockroaches, excretion is performed by Malpighian tubules. According to NCERT, each Malpighian tubule is lined by glandular and ciliated cells. These cells absorb nitrogenous waste products from the haemolymph and convert them into uric acid, which is then excreted out through the hindgut. Simple squamous epithelium is found in structures like the Bowman's capsule of humans, while brush-bordered cuboidal cells line the proximal convoluted tubule (PCT) of human nephrons. Answer: Glandular and ciliated cells