Medical Careers Ms. Bystrom
Urinary System Medical Careers Ms. Bystrom Functions Excretion:
removing waste from blood
Secretion: separation of certain materials from the blood
Elimination: emptying urine from the bladder Organs of the Urinary
System
Kidneys Ureters Bladder Urethra Two-bean shaped organs located high
in the abdominal cavity
Kidneys Two-bean shaped organs located high in the abdominal cavity
External Kidneys Covered by a tough fibrous capsule
Hilum: concave border where the renal artery enters and renal vein
and ureter exit Internal Kidney Divided into two sections: Medulla:
triangular
shaped wedges that separate and remove waste products from blood
Calyces:areas where waste is emptied Cortex: smooth areas around
medulla Nephrons The filtering unit of the kidneys Function:
Over 1 million per kidney Resembles a funnel with a long, twisted
tail Function: filtration: everything in blood is filtered out
Reabsorption: returns useful substances to bloodstream Secretion:
gets rid of waste The nephron unit Structures of the Nephron
Bowmans capsule: The hard, hollow capsule located on top of each
nephron Glomerulus: cluster of capillaries located inside of each
capsule The sections of the Nephron Ureters Long, slender muscular
tubes attached to each kidney, leading to the urinary bladder
Ureters Peristalsis: wave-like muscular contractions that move
urine down the ureter into the bladder Calculi: stones that form in
the renal pelvis and are washed down the ureter with urine Urinary
bladder Collapsible bag of muscular tissue that expands to serve as
a reservoir for urine Urethra Tube leading from the bladder to the
outside of the body
Sphincters: donut-shaped muscles that permit voluntary control of
bladder function. Define These Urinary Terms
Dysuria Polyuria Oliguria Pyuria Nocturia Hematuria Urinary Tract
Infection (UTI) Define:
Cystitis Urethritis Nephritis Tests Performed Urinalysis: test
performed on urine to determine its characteristics C & S:
culture and sensitivity; test performed to see if bacteria is
resistant or sensitive to certain meds Tests Performed Lithotripsy:
use of shockwaves to crush stones
Dialysis: mechanical process of removing waste from blood normally
removed by kidneys
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