Histology Flashcards
what are the 4 sections of the blood supply to the kidney?
renal artery - interlobar arteries - arcuate artery - interlobular arteries
in what part of the kidney is the interlobular artery only present?
renal cortex
which arteries supply the glomerulus?
interlobular arteries
what makes up renal corpuscles?
glomerular capillaries and Bowman’s space
Describe the venous drainage of the kidney
interlobular vein - arcuate vein - interlobar vein - renal vein
why do proximal tubules take up more stain than distal tubules?
high numbers of mitochondria present due to their high level of active transport
why is the lumen of the proximal tubule more difficult to see?
brush boarder of micro villi
how can vasa recta capillaries be easily identified in section?
presence of erythrocytes rather than fluid
where are medullary rays located?
centre of a lobule in cortex not medulla
what are medullary rays formed of?
rays of medullary tissue formed of parts of loops of Henle and collecting ducts associated with cortical nephrons
what smooth muscle layers are seen in the ureter?
longitudinal and circular
what are the 3 layers of urothelium?
basal layer, intermediate layers, surface cells
what is the function of surface urothelial cells?
form a watertight barrier and unable stretch
how do umbrella cells of urothelium form a watertight barrier?
luminal membranes are thick with a high lipid content, desmosomes and tight junctions on lateral boarders of cells
how do umbrella cells allow stretch of urothelium?
pleated quality so that they can quickly lengthen