Excretion is the process by which nitrogenous waste products produced by metabolism are removed from the body. The excretory process of grasshoppers is discussed below.
1. Malpighian tubule: Malpighian tubule absorbs water, potassium urate and CO2 from the blood. Inside the tubules, water, CO2 and potassium urate react together to produce potassium bicarbonate and uric acid. In these, potassium bicarbonate and water are reabsorbed and returned to the blood. Uric acid, on the other hand, passes into the rectum. Excess water from uric acid is absorbed in the colon and pure uric acid is excreted out of the body with stool.
2. Urate cells: The cells that store urea as urate are called urate cells. Urate cells mainly store protein, carbohydrates and fats as modified substances. In addition, it stores some uric acid in the hemolymph as urate. Dr. Siddiq Publications
3. Uricose Gland: The mushroom gland of male grass gharang contains uricos gland. They absorb excretory products from hemoceles and store them as uric acid. Uric acid is then excreted with the spermatozoa.
4. Cuticle: The nymph stage consists of amoebocyte cells floating in the hemocele. All these cells collect secretions from the blood and store them under the cuticle. During molting, the old cuticle along with the stored secretions are released.