The body cells in cockroach discharge their nitrogenous waste in the haemolymph mainly in the form of

The body cells of cockroach discharge nitrogenous waste in haemolymph mainly in the form of potassium urate. Malpighian tubules have glandular cells within. Glandular cells of distal secretory part extract nitrogenous wastes mostly in the form of salts of uric acid (e.g., potassium urate) and water from haemolymph forming urine. The urine flows towards the proximal absorptive part of tubule which reabsorbs certain salts, such as potassium bicarbonate, and some water resulting in precipitation of uric acid. Uric acid already present in haemolymph combines with reabsorbed potassium bicarbonate and water to form the relatively soluble potassium urate.