1. Kidneys remove nitrogenous waste from our body. They also work towards balancing the amount of vitamins , minerals, fat and protein that are found in the blood. They do this so that our body can easily perform day to day activities. 

2. Our intestine makes solid waste materials and is excreted through digestive tract. 

3. Each day our body eliminates around 1.6 to 1.8 liters of urine which contains liquids, minerals and vitamins that are of no use to the body. 

4. The bladder of a human body is nearly the same size as the average of human brain. 

5. In one individuals life span the liver can produce around 184.275 kgs of bile (6500 ounces). 

6. In our lifetime an individual could urinate close to 7,850,000,000 gallons of fluid.

 7. A really extraordinary fact regarding the excretory system is that upto 400 ml of urine can be held in human bladder. 

8. Urine contains a high amount of urea which can be used by plants as a source of nitrogen. Because of this diluted urine can be used in gardens and potted plants. 

9. It is amazing to see that each kidney is made up of approximately more than one million microscopic tubular functional units called nephrons or uriniferous tubules.