How harmfull is old urine?

What structures drains into the collecting tubule? What are the factors responsible for good health? Why do we need mucus? Which is the correct way to say too bad or is it to bad? Is it normal for teens to hate everyone and everything around them? Is it safe to go up stairs in a walking boot? Can you have your husband removed from your home by the police? Why not take a bath tonight? How long do phiten last? How can girls have nice feet? Are you really talking to a real person on simsimi? How can 1 heal the hypothalmus? Why is protein not usually seen in urine? How do humans get germs in their body? What are the long term effects of taking an upper with a downer? How do you get rid of swelling in the forehead? How much water does an average person require a day? Which duct receives lymph from most part of the body? What is the normal respiration rate for a rabbit? Name 5 senses?