2: Urinary Microanatomy- Patestas Flashcards
hilum opens into the
renal sinus
hilum is the site where vessels and nerves pass into or leave the kidney
funnel-shaped, proximal end of ureter
renal pelvis
fat filled cavity enclosing the branches of renal a and v. and lymph vessels and ureter and n. fibers
renal sinus
regions between the medullary rays
cortical labyrinth - contains renal corpuscles, convoluted tubules and connecting tubules
straight tubules and collecting ducts =
medullary rays (medullary tissue that extends from base of pyramids into cortex)
90-95% of blood flowing through kidney is in ..
cortex where is will be filtered through the glomeruli
inner region of kidney consisting of renal pyramids and renal columns of bertin
medulla
area cribosa =
around 20 opening of the papillary ducts of Bellini
projects and drains into minor calyx
the renal columns of bertin consist of ________ but are part of ________
cortical tissue
reside within and are part of medulla
= straight tubules and collecting ducts
the # lobes = # _____
pyramids
minor calyz recieves urine from renal papilla of a single renal pyramid
consists of central medullary ray and surrounding cortical tissue
kidney lobule
- collecting duct and all nephrons that empty into it
****nephron + collecting duct =
uriniferous tubule
structural and functional unit of kidney
nephron
cluster of fenestrated capillaries
glomerulus
composed of podocytes
visceral layer of bowman’s capsule
primary and secondary processes with filtration slits with diaphragm ** (nephrin)
space b/w visceral and parietal layers of bowman’s capsule
bowman’s space - contains ultrafiltrate
site where afferent arteriole enters renal corpuscel and efferent exits
vascular pole
urinary pole contains the initial part of PCT
layers of filtration barrier from inside –>
- endothelial surface layer of glomerular capillaries
- fenestrated endothelium of glomerular capillary *** no diaphragms over fenestrations
- basal lamina
- subpodocyte space
- visceral layer of bowman’s capsule (podocytes)
PCT and thick descending limb of loop of henle epithelium =
thin limbs epithelium =
thick ascending limb of loop of henle =
papillary ducts of bellini
simple cuboidal
simple squamous
low cuboidal with few microvilli
tall columnar
where is macula densa located?
modified segment of distal tubule located next to afferent arteriole
cortical collecting duct is part of _________, but not part of __________
uriniferous tubule
nephron
DCT empties into…
connecting tubule that drains into cortical or medullary collecting duct
papillary ducts of bellini are the continuation of medullary collecting ducts
juxtaglomerular apparatus =
macula densa
JG cells
extraglomerular mesangial cells
controls BP by activating RAA system
modified smooth m. cells in tunica media of afferent glomerular arteriole that contain renin
JG cells
