It can be the example of all kinds of sickness
<span>The urinary system comprises a series of organs, tubes, muscles and nerves that work together to produce, store and transport urine. The urinary system consists of two kidneys, two ureters, the bladder, two sphincter muscles, and the urethra</span>
If you touch it and it hurts that usually a sign you should not mess with it.
Make sure to be careful with residents
Cancer cells the branch of medicine concerned with the studying and treatment of tumor.