Microscopical features of the digestive tract in the rhea (Rhea americana americana, Linaeus, 1758)

M. N. Rodrigues, G. B. Oliveira, R. S. B. Silva, C. Tivane, J. F. G. Albuquerque, M. A. Miglino and M. F. Oliveira Surgery Department , Faculty of Veterinary Medicine and Animal Science (FMVZ-USP), Sao Paulo University (USP), Cidade Universitaria, Av. Prof. Dr. Orlando Marques de Paiva 87, Sao Paulo SP 05508270, Brazil. *Corresponding author: marcio_medvet@hotmail.com Department of Animal Science, Federal Rural of Semi Arid University, Mossoro, Rio Grande do Norte-Brazil. Av. Francisco Mota, 572, costa e silva, 59625900, Mossoro-RN