| A | B |
| excretory system | body system that collects and eliminates wastes from the body; includes the kidneys and bladder |
| kidney | organ of the excretory system that removes wastes from the blood and helps to maintain stable water levels in the body |
| ureter | tube of connective tissue that carries urine before it is excreted from the body |
| urinary bladder | saclike organ that collects and stores urine before it is excreted from the body |
| nephron | individual filtering unit of the kidney that removes waste from the blood |
| glomerulus | tangled ball of capillaries that circulates blood in the kidneys |
| dialysis | treatment in which a patient's blood is filtered through a machine, the waste is removed, and the cleaned blood is returned to the patient's body |