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Urinary System Parts: • • • • Kidney Ureters Bladder Urethra Kidney: • Cattle and poultry are composed of various lobes or parts • Horse’s right kidney is heart shaped and left kidney is bean shaped (picture) • Sheep and swine are both bean shaped Renal Cortex: • Outer tissue layer of the kidney Renal Artery: • Conveys blood to the kidney Renal Medulla: • Inner portion of the kidney How it works: • Blood filters from the capillaries into the blind sac of the urinary tubules • Urinary tubules network together and form larger tubules toward the center of the kidney where urine containing body wastes is collected Kidney Functions: • Filter waste from the blood • Regulates blood composition • Maintain normal internal life support conditions Ureters: • Tubules connecting the kidneys with the bladder • Transport urine from kidney to the bladder Bladder: • Expandable sac • Stores urine until urinated out of the body • Fetal Pig Bladder below Urethra: • Passes urine from the bladder through this elastic tube. • In the penis of males • Connected to the vagina in females Poultry: • Have no bladder • Urine is transported by the ureters to the cloaca where it is excreted with feces • No liquid is excreted Uric Acid: • White material in droppings • Urinary excretions