Urinary System

What are the organs of the urinary system?

• 2 kidneys: pair of organs in abd cavity, excrete urine

• 2 ureters: duct that urine passes from kidney to bladder

• 1 urinary bladder: membranous sac where urine collected for excreting

• 1 urethra: duct that urine is removed out of bladder+body

How do the kidneys contribute to the body’s homeostasis when filtering blood and producing urine?

• Adjust vol+chem composition of blood

• Regulating water vol

• Regulate blood electrolyte lvl (Ns+, Ca2+)

• - waste+unneeded substances from blood

• Regulate blood pH

• Secrete renin to regulate BP

• Stim erythrocyte production by secreting erythropoietin

Where are the kidneys located?

• High in abdominopelvic cavity on both sides o vertebral column

• Retroperitoneal: lie outside and behind peritoneum

• Anteriorly protected by int organs and posteriorly by back muscles and ribs

• Left kidney slightly more superior than right

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