Chapter 9 The Urinary System A&P Flashcards
is the process through which the body maintains a constant internal environment
homeostasis
is a waste product of muscle metabolism
creatinine
constantly filter the blood to remove waste products and excess water.
kidneys
means pertaining to the kidneys
renal
means behind the peritoneum, which is the membrane that lines the abdominal cavity
retroperitoneal
is the outer region of the kidney
renal cortex
is the inner region of the kidney, contains urine-collecting tubules
medulla
is a small tube
tubule
are the microscopic functional units of each kidney. urine is produced here
nephrons
is the return to the blood of some of the substances that were removed during filtration
reabsorption
is a cluster of capillaries surrounded by a cup-shaped membrane called the Bowman’s capsule and a renal tubule
glomerulus
blood enters the kidney through this and flows into the nephrons
renal artery
blood cells leave the kidneys and return to the blood stream through the
renal vein
is the funnel-shaped area inside each kidney that is surrounded by the renal cortex and medulla
renal pelvis
are two narrow tubes, each about 10 to 12 inches long, which transport urine from the kidney to the bladder
ureters
is a series of wave-like contractions, moves urine down each ureter to the bladder
peristalsis
urine drains from the ureters into the bladder through this structure in the wall of the urinary bladder
ureteral orifices
means opening
orifice
is an oval, hollow muscular organ that is a reservoir for urine before it is excreted from the body
urinary bladder
is the tube extending from the bladder to the exterior of the body
urethra
one located at either end of the urethra. muscular rings control the flow of urine from the bladder into the urethra, and out of the urethra through the urethral meatus
urinary sphincter
is a ring-like muscle that closes a passageway
sphincter
means the external opening of a canal
meatus
is approximately 1.5 inches long, and the urethral meatus is located between the clitoris and the opening of the vagina
female urethra