Major content provider: U.S. National Cancer
Urinary System: Unit Review
Here is what we have learned from this unit:
- The urinary system rids the body of waste materials, regulates fluid volume, maintains electrolyte concentrations in body fluids, controls blood pH, secretes erythropoietin, and renin.
- The components of the urinary system are the kidneys, ureters, urinary bladder, and urethra.
- The primary organs of the urinary system are the kidneys, which are located retroperitoneally between the levels of the twelfth thoracic and third lumbar vertebrae.
- The cortex and medulla make up the parenchyma of the kidney.
- The central region of the kidney is the renal pelvis, which collects the urine as it is produced.
- The functional unit of the kidney is a nephron, which consists of a renal corpuscle and a renal tubule.
- The ureters transport urine from the kidney to the urinary bladder.
- The urinary bladder is a temporary storage reservoir for urine.
- The urethra is the final passageway for the flow of urine.
- The flow of urine through the urethra is controlled by an involuntary internal urethral sphincter and voluntary external urethral sphincter.