Renal anatomy Flashcards
Kidneys location
retroperitoneally, in lumbar region
Upper poles
12 thoracic
Lower poles
3rd lumbar
Hili lie at
transpyloric plane opposite 1stlumbar vertebra
Kidneys relation
anteriorly to peritoneum and abdominal organs
Right kidneys relations
liver, hepatic flexure, descending part of the duodenum, and adrenal gland
Left kidneys relations
to splenic flexure, stomach, pancreas, jejunum, spleen and adrenal
Posteriorly to muscles on posterior abdominal wall
psoas major, quadratus lumborum, transversus abdominis and diaphragm
Surrounds each kidney but easily stripped off
Renal capsule/ True capsule-Surrounds
Helps keep the kidney in its correct location
Adipose capsule or perirenal fat
derived from fascia transversalis
Renal fascia of Gerota
Inbetween layers of gerotas fascia
Gerotas space
Anterior layer of gerotas spacia fuses with the opposite side and blends with walls of
renal blood vessels, aorta and vena cava
posterior layer blends of gerotas spacia
fascia of psoas and quadratus lumborum ms
Posterior and anterior layer of derotas spacia Fused superiorly and form separate compartment for
Adrenal gland
consist of structures at the Hilus namely renal vessels, ureters and nerves
Renal pedicle
Cushioning effect of the adjacent organs
Renal pedicle
Medial concave margin called
Hilus
hilus leading to a cavity
Renal sinus
Within sinus lie the
renal pelvis, calyces and the renal blood vessels
Parenchyma consists of
Cortex and medulla
Sinus is lined by
fibrous membrane continuous with the true capsule and fibrous coats of the vessels and collecting system
Medulla–consists of subdivisions called
Renal pyramids
Between the pyramids are the
Renal olumn of bertini
Bases of the pyramids are directed towards cortex and apices called
Renal papilla
Tips of the papilla are perforated and are called
Cribosa
refers to the subcapsular zone of cortex
Cortex cortices
portion of the cortex between pyramids and cortex
Cortical arches
radially directed striations representing bundles of tubules
Medullary rays
refers to the kidney parenchyma served by one papilla: one renal pyramid and its overlying cortex
Renal lobe
refers to the meddullary ray with the immediately associated cortical tissue
Renal lobule
constitute the tubular functional unit of the kidney
Uriniferous tubules
secretory part concerned with urine formation
Nephron
concentrates urinary solute to form a hypertonic urine
Collecting tubules
receives renal papilla
Minor calyces
Formed by the union of minor calyces
Major calyces
formed by union of major calyces: funnel shaped structure occupying renal sinus and represents the expanded beginning of the ureter
Renal pelvis
Both renal arteries arise from the
Aorta
both renal veins drain into the
IVC
The kidneys consume ___% of the heart’s cardiac output
20
The arteries generally lie __________ to the vein within the renal hilum
Posterior
The renal pelvis is generally ____________ to the vessels
Inferoposterior
The right renal artery is _________ than the left
Longer
The right renal vein is __________ than the left
Shorter
The right renal artery crosses the IVC __________
Posteriorly
The left renal vein crosses the aorta___________
Anteriorly
The renal artery branches into the
Anterior and posterior segmental artery
4 additional segmental arteries
Apical, upper, middle, lower
ascend between the pyramids and renal columns ( no branches to the renal parenchyma
Interlobar artery
located at the corticomedullary junction
Arcuate artery
lie between medullary rays
Interlobular artery
going to the renal glomeruli
Afferent arteriole