Suminder kaur, Academic Content Writer at Edumarz
The process by which waste materials created during metabolic processes are eliminated from the body is known as excretion.
Diffusion transports waste products from cells to the surrounding environment in unicellular organisms.
Waste products are eliminated by specialized organs in multicellular organisms.
EXCRETION IN HUMAN BEINGS
A pair of kidneys, a pair of ureters, the urinary bladder, and the urethra make up the excretory system. Nephrons are a kind of excretory unit found in each kidney.
Each nephron comprises a cup-like structure called Bowman’s capsule, which contains a glomerulus, which is a bundle of capillaries.
Bowman’s capsule connects to a tubular structure that connects to a collecting duct. The renal artery transports nitrogenous wastes such as ammonia, urea, and uric acid (urine) into the nephron, as well as excess water, salts, and other substances. It filters nitrogenous waste, water, and salts before they enter the collecting duct through the tubular structure.
The waste then flows via the ureters and into the urinary bladder before being expelled as urine through the urethra.
Amino acids, glucose, salts, and other important compounds are reabsorbed by the capillaries surrounding the tubular structure and reabsorbed into the true vein.