Excretory System

Function: Eliminates waste products produced by the digestive, integumentary, etc.


1.The average adult bladder can hold 16-24 ounces of urine.

2. Urine is 95% water

3. The human intestine is usually 27 feet long and 10 inches. (8.5 meters long)

4. The liver is rubbery to the touch

5. The average person poops 305 lbs. a year


The excretory system is involved in maintaining homeostasis by getting rid of metabolic wastes in our bodies. An example would be exhaling CO2. Urinating is another example.

In other words, the excretory system (which eliminates metabolic wastes) is accomplished by the urinary and respiratory systems.


Also identified as nephrotic syndrome, nephrosis includes symptoms of swelling, protein in urine, low blood protein levels, high cholesterol levels and elevated triglyceride levels. The causes of nephrosis include membranous nephropathy, immune system disorders, genetic problems, kidney malfunction, infections such as hepatitis, mononucleosis or strep throat, use of certain medications, etc. The treatment of nephrosis consists of removing the disorders that are causing it. It is also necessary to change the diet of the patient so the high cholesterol and triglyceride levels are controlled.


  • Swelling in face, abdomen, arm and legs.
  • Foamy urine
  • Slight weight gain due to retained fluids
  • Loss of appetite