CH15 : Urinary System

What does the urinary system do?

Filters notorious waste from blood and helps regulate water, electrolyte, & acid base balance

Main organ of urinary system is?

Kidneys, filter blood, regulates blood volume, & chemical makeup

Nephrons

Structural functional units of kidneys that are responsible for making urine; nitrogenous waste (urea/uric acid) are filtered out and excreted as urine kidney makes 1-1.8 liters of urine per day

Ureters

2 slender tubes that run from kidneys to urinary bladder. Smooth muscles propel urine by peristalsis

Urinary bladder

Muscular sac that stores urine. Made of smooth muscle & contains transitional epithelial tissue that can stretch which allows its wall to expand

Urethra

Thin walled tube that carries urine by peristalsis from bladder to outside of body. Urethra contains sphincters that keep urethra closed that can be controled voluntarily