Page 438 - Anatomy and Physiology of Farm Animals, 8th Edition

The Urinary System / 423

(A) Renal lobes Cortex Medulla
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Renal vein Renal
pyramid

Renal
artery
Ureter
(B) Calyces
Cortex Medulla

Renal Renal papilla
vein

Renal
pelvis

Renal
artery
Ureter
(C) Renal pyramid
Cortex Medulla
Renal
artery
Renal
crest

Renal
vein
Renal
pelvis
Ureter
Figure 23-1. External and median‐section anatomy of kidneys. (A) Bovine. (B) Porcine. (C) Equine.
The structure of small ruminant kidneys is similar to that of horses, with a smooth cortex and grossly
fused renal papillae.

each lobe constitutes a renal pyramid, kidney. In the pig, horse, and small rumi-
whose apex, the renal papilla, is directed nants, the adjacent cortices of individual
toward the renal pelvis. In the bovine kid- lobes are fused, so that the surface of the
ney, each pyramid is associated with one of kidney appears smooth. The individual
the grossly obvious lobes of the bovine nature of the porcine lobes is revealed,