Hair and Skin  
The Skeleton  
The Muscular System  
The Nervous System  
The Digestive System  
The Urinary System  
The Reproductive System  

DOG'S URINARY SYSTEM

The dog's urinary system is similar to that of other mammals. Its purpose is to process and get rid of liquid wastes. The main parts of the urinary tract are the kidneys (used to excrete urea, uric acid and other wastes), the bladder (a receptacle for fluid), and the urethra (the canal that carries the urine from the bladder).

Urinary-tract ailments are more common in older dogs, although puppies may have urinary-tract infections. These infections may exist as part of a major disease, such as leptospirosis, or as a primary condition.