1. Excretory System By Katie Ust

2. function  Rid of waste, chemical build up, and useless cell byproducts  Maintain balance

3. Types of Nitrogenous Waste  Ammonia – produced by aquatic animals because only low concentrations can be tolerated  Urea – produced by mammals, adult amphibians, sharks in vertebrate liver  Uric acid – produced mainly by insects, reptiles, and birds because it requires little water loss

4. Excretory processes Filtration  Renal corpuscle  Filters blood reabsorption  Renal tubule  Solutes and water removed from tubular fluid and transported into blood

5. Excretory Processes Secretion  Transfer of material from peritubular cavities to renal tubular lumen  Active transport excretion  Rids the body of unnecessary wastes

6. nephritis  Inflames nephrons  Caused by exposure to chemicals and toxins  Symptoms include swelling from accumulated fluid, urine suppression, and a pale complexion

7. Kidney stones  Crystals are formed around foreign material  Symptoms include pain in side or back during urination  Pain varies case to case, but can be very serious  Can potentially block ureters and must be removed by doctors

8. Sources  Library.thinkquest.org/07aug/0168/excret ory.html  Biologie.uni-hamburg.de/b- online/library/falk/Excretion/excretion.htm