Zoology - Structural Organisation in Animals Question with Solution | TestHub

In cockroach, the midgut has glandular epithelium that secretes many digestive enzymes. 6-8 hepatic or gastric cecae open at the junction of foregut and midgut. These are blind ducts meant for secreting digestive enzymes. 100 - 150 yellow coloured, thin filamentous structures are known as Malpighian tubules open at the junction of midgut and hindgut. These collect excretory waste from the haemolymph and pour the same into the hindgut.