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DESENVOLVIMENTO EMBRIOLÓGICO ÓSSEO E CARTILAGÍNEO EM BOVINOS

2012; Sociedade de Medicina Veterinária do Estado do Rio de Janeiro; Volume: 34; Issue: 4 Linguagem: Inglês

2527-2179

Hugo Andrés Gutierrez Trujillo, Míryan Lança Vilia Alberto, Sonia Elisabete Alves de Lima Will, Maria Letícia Baptista Salvadori, José Roberto Kfoury, Carlos Eduardo Ambrósio, Maria Angélica Miglino,

Animal Genetics and Reproduction

ABSTRACT. Trujillo H.A.G., Alberto M.L.V., Will S.E.A.de L., Salvadori M.L.B., Kfoury Jr. J.R., Ambrosio C.E. & Miglino M.A. [Embryological development of bone and cartilage in cattle]. Desenvolvimento embriologico osseo e cartilagineo em bovinos. Revista Brasileira de Medicina Veterinaria, 34(4):361-367, 2012. Departamento de Cirurgia, Faculdade de Medicina Veterinaria e Zootecnia, Universidade de Sao Paulo, Avenida Prof. Dr. Orlando Marques de Paiva, no 87, Cidade Universitaria, Sao Paulo, SP 05508-270, Brasil. E-mail: soniawill@usp.br. The skeletal system comes from cells of mesoderm and neural crest. Bone is formed from two types of connective tissue, cartilage and mesenchyme. The endochondral ossification begins on a mold of hyaline cartilage, with a format similar to the bone that will arise, being responsible for the formation of short and long bones. So we feel will be of great value to a study based in the normal development of the members of bovine embryos and fetuses from cows raised on natural environment, through studies on light microscopy and transmission electron microscopy. The results obtained in this study, we found that the mesenchymal cells differentiate into chondroblasts to form embryos with CR of 20.0 mm, which appear in primary cartilaginous molds embryos with CR of 25.0 mm and forelimb presents in format and small plate of hind limb bud embryo with CR of 28.0 mm. There is also the presence of mold hyaline cartilage, perichondrial tissue chondroblasts and around the fetus with CR 30.0 mm, and fetuses CR 76.0 mm chondrocyte death occurs in the largest area of calcification and cytoplasmic matrix.