English English Excretory system http://en.wikipedia.org/wiki/Excretory_system English Excretory system English English Excretory system English 4 External links Excretory system 2.3 Kidneys Excretory system Excretory system excretory system Excretory system English English excretory system Excretory system Full article ▸ Excretory system English Excretory system English English Excretory system Excretory 3 Urine Formation bodily wastes excretory system 2.6 Urinary bladder Wikipedia Engels English English English Excretory system 2.2 Lungs English English 2.4 Defecation Wikipedia Excretory system Wikipedia Wikipedia Excretory system English 2.7 Urethra English English excretory system 2.5 Ureter English 2 Component organs Wikipedia 1 Excretory functions English Excretory system English 2.1 Skin English Excretory Excretory_system Engels Excretory system Excretory system English English Excretory system