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23 Cards in this Set
- Front
- Back
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Urinary Systme
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Kidneys, ureters, urninary bladder and urethra
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Female
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urinary and reproductive system are anatomically seperate.
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Male
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urinary and reproductive system overlap:
male urethra= -passageway for urine and semen -longer |
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Male 3 regions of urethra
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-prostatic urethra
-membranous urethra -penile urethra |
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Micturition
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aka urination.
bladder>urethra>ecternal environment -detrusor muscle contracts -inter. and exter. urethral sphincters relax |
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detrusor muscle
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muscularis of bladder
-3 layers of smooth muscle (contract during micturition) to force contents of bladder down to urethra |
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internal urethral sphincter
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-ring of smooth muscle located @ junction of bladder and urethra.
-involuntary control |
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external urethral sphincter
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-ring of skeletal muscle.
located inferiorly to int. ureth. sphinc. -voluntary control |
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kidneys
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retroperitoneal.
-attached to posterior abdominal wall. btwn T12 &L3 renal hilus: medially concave edge >renall artery, renal vein and ureter emerge. |
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adipose capsule
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helps protect and cushion each kidney
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renal cortex
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(outter) of inner
contains about 1 million glomeruli |
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renal medulla
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(inner) of inner
contains renal tubues |
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renal calyces
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after urine is formed by nephrons, urine is delivered thru renal calyces to reach the renl pelvis.
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renal pelvis
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urine from renal calyces got to renal pelvis to drain away from kidney by the ureter.
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nephron
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functional unit of kidney.
about 1 million in each kidney. -located:renal cortex and renal medulla. |
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renal corpuscle
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start of the nephron.
(located in renal cortex) -includes: capillary ball called glomerulus & a cup shaped glomerular capsule |
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1st step in urine formation
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when a portion of blood plasma leaves the glomerulus and enter the glomerular capsule.
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renal tubules
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filtrate travels thru continuous tube having several subsections.
renal tubules: -proximal convoluted tubule -loop of henle -distal convoluted tubule |
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distal convoluted tubules
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empties into a collecting duct
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tubular reabsorption
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process which filtrate is modified by passing through the renal tubules and collecting duct.
material is removed from filtrate and returned to blood |
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tubular secretion
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material is added to filtrate
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renal pyramids
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collecting ducts, which drain filtrate from several nephrons descend through renal pyramids and converge with other collecting ducts> form larger papillary ducts
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Papillary ducts
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drain urine into minor calyces, which may converge into major calyces then into renal pelvis, ureters and to the urinary bladder for storage.
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