The excretory system eliminates all the wastes that are produced by homeostasis. Also the process of eliminating waste matter.
Kidney stones are small size of calcium that can be seen in the nephrons, stones can go down the urinary tract and cause extreme pain. A couple symptoms are vomiting or nausea, painful urination, fever of chills, bloody or smelly urine. Taking a lot of fluids so the stones can be washed out, and painkillers are a good treatment.
Cystitis is the inflammation of the bladder. If you are having blood in urine, cloudy urine, pain or difficulty when urination, and/or foul-smelling urine, you should get a check up because those are signs of cystitis. A treatment is a antibiotics for bacteria.