Trabalhamos com 8 jabutis, 4 fêmeas e 4 machos da espécie Geochelone carbonaria, para descrição da morfologia macroscópica e microscópica de luz e eletrônica de varredura do rim. Observamos que os rins são órgãos compactos, de forma piramidal, coloração vermelha escuro, e de aspecto cerebróide. Histologicamente o néfron apresenta glomérulo de Malpighi, túbulo contornado proximal, túbulo contornado distal, alça de Henle, túbulo coletor e ureter. Observamos também que todas estas estruturas secretam grânulos de muco neutro.

Eight tortoises have been used in this study i.e., 4 females and 4 males belonging to the Geochelone carbonaria species, in order to describe the macroscopic morphology, light microscopic morphology and the scanning electron microscopic morphology of the kidney. It has been observed that the kidney are compact, pyramid-shaped organs with a dark reddish coloring and circunvolutioned appearance. From a histological point of view, the nephron presents Malpighian corpuscle, proximal contoured tubule, loop of Henle, collector tubule and ureter. It has been also noticed that every renal structure secrete neutral-mucus granules.