The Urinary System Flashcards
(148 cards)
the process through which the body maintains a constant internal environment
homeostasis
the major waste product of protein metabolism
urea
a waste product of muscle metabolism
creatinine
2 kidneys, 2 ureters, 1 bladder, and 1 urethra
urinary tract
the reproductive system and the urinary tract
genitourinary tract
bean-shaped organs that constantly filter the blood to remove waster products and excess water which is excreted urine that is 95% water and 5% urea and other body wastes
kidneys
pertaining to the kidneys
renal
behind the peritoneum, the membrane that lines the abdominal cavity
retroperitoneal
the outer region of the kidney; contains more than 1 million microscopic units called nephrons
renal cortex
the inner region of the kidney; contains most of the urine-collecting tubules
medulla
the inner region of the kidney; contains most of the urine-collecting tubules
medulla
the microscopic functional units of each kidney; here, the urine is produced through the processes of filtration, reabsorption, and secretion
nephrons
a cluster of capillaries surrounded by a cup-shaped membrane and a renal tubule
glomerulus
where blood enters the kidneys and flows into the nephrons
renal artery
where the filtered blood containing protein and blood cells leaves the kidney and returns to the bloodstream
renal vein
the funnel-shaped area inside each kidney that is surrounded by the renal cortex and medulla; where newly formed urine from the nephrons collects before it flows into the ureters
renal pelvis
2 narrow tubes, each about 10-12 inches long, which transport urine from the kidney to the bladder
ureters
a series of wave-like contractions, moves urine down each ureter to the bladder
peristalsis
where urine drains from the ureters into the bladder
ureteral orifices
an oval, hollow, muscular organ that is a reservoir for urine before it is excreted from the body; located in the anterior portion of the pelvic cavity behind the pubic symphesis
urinary bladder
lines the rubber; allow it to expand when full and contract when empty
rugae
the tube extending from the bladder to the exterior of the body
urethra
muscular rings that control the flow of urine from the bladder into the urethra and out of the urethra through the urethral meatus; one located on either end of the urethra
urinary sphincters
the external opening of the urethra
urethral meatus