CHAPTER 12
Urinary System
225
Figure 12-2.
Overview of the kidney.
The kidney can be divided into three regions: the
renal cortex
, the
renal medulla
, and the
hilum
. The
renal cortex
is composed
of
renal corpuscles
,
proximal
and
distal convoluted tubules
,
cortical collecting tubules
, and the blood vessels supplying the renal
cortex. The
renal medulla
is made up of
renal pyramids
. The renal pyramids can be divided into three zones: the
outer medulla
, the
inner medulla
, and the
renal papillae
. The renal medulla is composed of several types of tubules oriented parallel to one another: the
descending limb of the loop of Henle
(thick descending and thin descending limbs), the
ascending limb of the loop of Henle
(thin
ascending and thick ascending limbs), the
cortical collecting tubules
, the
collecting ducts
, and the
papillary ducts
(see Fig. 12-8B).
The papillary ducts drain urine into the
minor calices
and then to the
major calices
; the major calices merge into the
renal pelvis
,
which drains urine into the
renal ureter
. The blood vessels supplying the kidneys include the
renal artery
and
vein
, branches of the
renal artery and vein (
segmental arteries
and
veins
),
interlobar arteries
and
veins
,
arcuate arteries
and
veins
,
interlobular arteries
and
veins
, and
afferent
and
efferent arteries
. The microvasculature consists of the
glomeruli
of the
renal corpuscle
, the peritubular
capillaries, and the vasa recta.
Renal
pelvis
Renal
ureter
Renal vein
Branches (segmental)
of renal vein
Branches (segmental)
of renal artery
Arcuate artery
Arcuate vein
Interlobular artery
Interlobar artery
Interlobar vein
Renal
glomerulus
Renal artery
Renal medulla
Major calyx
Minor calyx
Renal papilla
Renal pyramid
Outer medulla
Inner medulla
Renal cortex
Renal corpuscle
Renal capsule
Vascular Supply of the Kidney
Renal
artery
Renal
vein
Arcuate veins
Interlobular
arteries
Peritubular
capillary network
to venules
Afferent arterioles
Renal
corpuscle
Renal
cortex
Renal medulla
and hilum
Efferent arterioles
Glomerulus
Vasa recta
Interlobar
arteries
Branches
of renal arteries
(segmental arteries)
Branches
of renal veins
(segmental veins)
Interlobar
veins
Interlobular
veins
Arcuate
arteries
previous page 240 Dongmei Cui -  Atlas of Histology with Functional and Clinical Correlations 2011 read online next page 242 Dongmei Cui -  Atlas of Histology with Functional and Clinical Correlations 2011 read online Home Toggle text on/off