1) Maintaining the constant concentration of blood plasma a) Kidney b) Arota c) Urinary bladder d) Urethra e) Right ureters f) Left renal vein 2) It is a device used to remove nitrogenous waste products from the blood through dialysis. a) Tube b) Urine c) Poisonous d) Artificial kidney e) Infectious f) Nephron 3) Process that is to remove nitrogenous wastes such as urea from the body a) Respiration b) Excretion c) Nutrition d) Transportation e) Circulation f) Aerobic Respiration 4) It releases the urine out of the body a) Anus b) Testis c) Urethra d) Penis e) Urinary bladder f) Scrotum 5) It results in accumulation of wastes inside the body. a) Urea b) Renal vein c) Kidney failure d) Ureter e) Kidney f) Renal artery 6) Tube which carries urine from kidney to the bladder a) Ureter b) Urethra c) Renal vein d) Renal artery 7) Gas excreted by the lungs a) Oxygen b) Carbon dioxide c) Hydrogen d) Nitrogen 8) Which of the following is NOT an excretory organ a) Skin b) Kidney c) Lungs d) stomach 9) Where is urine produced a) Bladder b) Kidney c) Liver d) Large intestine 10) Primary role of sweating a) Remove excess water  b) Removal excess heat c) Removal of salts d) Moisture the skin

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