The Urogenital System of the chicken is all of the organs that are involved in the excretory system.
The main functions of the excretory system are to:
remove excess nitrogen and other waste products in the form of uric acid
get rid of a controlled amount of water and salts to maintain a balanced internal environment
The urinary tract responsible for the creation of urate and filtering blood is comprised of the kidneys, ureters, and genital tracts.
Chickens don't have a urinary bladder so their urine can not be stored.
The kidneys are the main organ of the chicken's excretory system and are found behind the lungs in the boney cavities formed by the ilium and synsacrum of the pelvis.
The chicken's kidney has three lobes and hosts the functions of managing acid-base balance and excretes water and metabolic waste.
The ureter is a narrow tube that leaves the medial border of the kidney and connects to the cloaca.
The ureter of the chicken carries the urate from the kidney to the cloaca. The ureter usually connects the kidney to the urinary bladder, however, the chicken doesn't have one.
This is the reason why chicken dropping is usually composed of a brown part (poop) and a white part (the urate).