Comparative Thickness of the Medulla of Bos taurus and Bos indicus Kidneys

Twenty kidneys of 4 years old Bos taurus cattle and 26 kidneys of 2—4 years old Bos indicus (Zebu cattle) of East African Shorthorn breen were examined lobe by lobe after fixation. The cortex and medulla with subunits were measured and compared in the two sub-species. The width of the cortex was about the same in both. The outer and inner stripes of the outer medullary zone were significantly broader in Bos taurus whereas outer inner zone was significantly broader in Bos indicus. The width of the entire medulla was greater in Bos taurus.