The renal structure in an Asian elephant (Elephas maximus)

Area of Science:

• Veterinary Anatomy
• Comparative Mammalian Renal Histology

Background:

• Understanding elephant renal anatomy is crucial for conservation and veterinary care.
• Limited detailed studies exist on the Asian elephant (Elephas maximus) kidney structure.

Purpose of the Study:

• To provide a comprehensive macroscopic and light microscopic description of the Asian elephant kidney.
• To compare observed renal structures with those of other mammalian species.

Main Methods:

• Macroscopic examination of both kidneys (left and right).
• Light microscopy of renal tissue sections.
• Detailed measurements of kidney dimensions and weight.

Main Results:

• Asymmetrical kidney shapes (left: elongated-ellipse, right: round) and weights were recorded.
• Both kidneys exhibited six external renal lobes, fused internally, indicating an incompletely lobated structure.
• Histological examination revealed renal corpuscles with glomeruli and Bowman's capsules, containing mesangial cells and podocytes. Bowman's capsules were notably larger than in other mammals.

Conclusions:

• The Asian elephant possesses an incompletely lobated kidney with unique morphological characteristics.
• The larger Bowman's capsules suggest potential adaptations in renal filtration capacity for this species.