In recent years, avian medicine has advanced in the recognition of kidney diseases, but little is known about the morphology and renal morphometry of the common ostrich Struthio camelus Linnaeus, 1758. This study aimed to describe the morphometry and location of kidneys in the common ostrich. Twenty-six cadavers, aged one to seven days, which died of natural causes on a farm in the municipality of Magé, state of Rio de Janeiro, Brazil, were donated to the Department of Animal and Human Anatomy at the Universidade Federal Rural do Rio de Janeiro (UFRRJ). The specimens were identified, sexed, and fixed in a 10% aqueous solution of formaldehyde. The kidneys and renal divisions were measured using a precision digital caliper. The kidneys of S. camelus are elongated, and lobular, and have three renal divisions (cranial, middle, and caudal). The average length of the right kidney was 6.69 ± 0.83 cm, and the left kidney was 6.87 ± 0.81 cm. The body length correlated positively and significantly with the lengths of the right kidney (r = 0.8273, p = 0.0017) and left kidney (r = 0.8534, p = 0.0008) in females. The renal cranial limit was observed at the eighth lumbar vertebra (L8) in 22 kidneys (42.3%), and the caudal limit, at the eighth sacrocaudal vertebra (Sc8) in 11 kidneys (21.2%), and the second caudal vertebra (C2) in 11 kidneys (21.2%). The morphometric dimensions and skeletopy of the ostrich kidney contribute to the field of comparative avian anatomy and assist in the interpretation of imaging techniques.

Thais Mattos Estruc

Renata Medeiros do Nascimento

Carlos Augusto Santos-Sousa

Paulo Souza Junior

Anieli Vidal Stocco

Letícia Victal Pereira

Marcelo Abidu-Figueiredo

Acta Scientiarum Biological Sciences

The journal publishes original articles in all areas of Biological Sciences, including anatomy, bacteriology, molecular biology, biochemistry, botany, cytology and cell biology, animal behavior, ecology, limnology, embryology, and histology, morpho-physiology, genetics, microbiology, parasitology and zoology.

The journal publishes original articles across all areas of Biological Sciences, including anatomy, bacteriology, molecular biology, biochemistry, botany, cytology and cell biology, animal behavior, ecology, limnology, embryology, histology, morpho-physiology, genetics, microbiology, parasitology, and zoology.

《Acta Scientiarum - Biological Sciences》期刊发表生物科学各个领域的原创文章，包括解剖学、细菌学、分子生物学、生物化学、植物学、细胞学和细胞生物学、动物行为学、生态学、淡水生物学、胚胎学、组织学、形态生理学、遗传学、微生物学、寄生虫学和动物学等。

Morphometric study of ostrich kidneys Struthio camelus Linnaeus, 1758

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