Matching Pairs Excretory System MatchOnline version Test your knowledge of the human excretory system with this matching pairs game! by Rachel Jackson 1 Kidneys 2 Ureters 3 Nephron 4 Excretion 5 Urethra 6 Urine 7 Skin 8 Sweat 9 Liver 10 Sphincter 11 Bladder 12 Urinary System Salty waste excreted by the skin Stores urine Liquid waste excreted by the kidneys Muscle that controls the release of urine Functional unit of the kidney Transport urine from kidneys to bladder Process of removing wastes from the body Largest organ in the human body Processes waste products from cell metabolism into safer substances Carries urine from bladder to outside the body Filter waste from blood Eliminates waste from the body