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58 Cards in this Set

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Homeostatic Regulation/functions of urinary system
1. composition and volume of blood
2. blood pressure
3. ionic composition
4. glucose levels
5. excretes waste and foreign materials
kidney
bean shaped organ locaed just above the waist behind the peritoneum on the posterior wall of the abdominal cavity
renal capsule
most superior/external tissue layer of the kidney
renal cortex
outer, superficial layer; site of urine formation
renal medulla
deeper, inner layer; site of urine collection and nutrient and water reabsorption
renal hilus
located near the center concavity of the kidney; site where ureter leaves and blood vessels enter
renal pyramid
8-18 triangular masses of tissue in the medulla; base faces cortex and apex points toward the renal hilus
renal column
portions of the renal cortex that extend between the renal pyramids
renal papillae
the apices of the renal pyramids
minor calyx
small cuplike collecting structures; receive from the renal papillae
major calyx
larger collecting structures that the minor calyces converge on
renal pelvis
large cavity into which urine collects from the major calyces
ureter
tube that enters the kidney at renal hilus and drains the renal pelvis; empties into the urinary bladder; one per kidney
urinary bladder
hollow distensible muscular organ situated in the pelvic cavity posterior to the pubic symphysis
trigone
site where ureteral openings from the base points of a triangle with apex being the internal urethral orifice
capacity
700-800 ml; the bladder will automatically contract when it reaches full capacity
urethra
tube leading form bladder to outside the body to void urine; 4cm in females, of variable length in males: 15-20 cm
nephron
located in renal cortex, extends down into the medulla
renal corpuscle
in cortex; has Bowman's capsule, glomerulus, and capsular space
Bowman's capsule
double walled cup
glomerulus
capillary ball in the center of the Bowman's capsule; site of filtration
capsular space
space between Bowman's capsule and glomerulus
renal tubule
medullar extension; reabsorbs 99% of filtrate
proximate convoluted tubule
coiled tube attached to the renal corpuscle
descending limb of henle
section that dips down into medulla
loop of henle
u-shaped bottom of tubule
ascending loop of henle
section that ascends back up to the cortex
distal convoluted tubule
coiled tube attached to ascending limb of henle; opens into collecting ducts
collecting duct
common site for multiple nephrons to connect; runs through renal pyramids
right/left renal arteries
carry blood to kidney
capacity
700-800 ml; the bladder will automatically contract when it reaches full capacity
urethra
tube leading form bladder to outside the body to void urine; 4cm in females, of variable length in males: 15-20 cm
nephron
located in renal cortex, extends down into the medulla
renal corpuscle
in cortex; has Bowman's capsule, glomerulus, and capsular space
Bowman's capsule
double walled cup
glomerulus
capillary ball in the center of the Bowman's capsule; site of filtration
capsular space
space between Bowman's capsule and glomerulus
renal tubule
medullar extension; reabsorbs 99% of filtrate
proximate convoluted tubule
coiled tube attached to the renal corpuscle
descending limb of henle
section that dips down into medulla
loop of henle
u-shaped bottom of tubule
ascending loop of henle
section that ascends back up to the cortex
distal convoluted tubule
coiled tube attached to ascending limb of henle; opens into collecting ducts
collecting duct
common site for multiple nephrons to connect; runs through renal pyramids
right/left renal arteries
carry blood to kidney
segmental arteries
enter the kidney
interlobar arteries
branches of segmental arteries; travel up the renal columns
arcuate arteries
arteries that run the base of the renal pyramid
interlobular arteries
divisions of the arcuate; travel to the glomerulus
afferent arteries
enter the glomerulus
glomerulus
capillary ball
efferent arteriole
carry blood out of the glomerulus
vasa recta
capillary network that surround the nephron in the medulla; site of most reabsorption
interlobular veins
reuniting of the vasa recta
arcuate veins
run the base of the renal pyramid
interlobar veins
travel down the renal columns
right and left renal veins
carry blood away from the kidneys
complete pathway for urine drainage
1. afferent arteriole
2. glomerulus
3. proximal convoluted tubule
4. descending limb of Henle
5. loop of Henle
6. ascending limb of Henle
7. distal convoluted tubule
8. collecting duct
9. renal pyramid
10. renal papillae
11. minor calyx
12. major calyx
13. renal pelvis
14. ureter
15. urinary bladder
16. urethra