Desenvolvimento embrionário do fígado e do pâncreas de embriões e fetos bovinos

Abstract

In domestic mammals, the increase in production rates as well as the greater dissemination of superior genetic material in herds, has been the subject of intense studies and investments, which has allowed a great advance and development of several biotechnologies related to animal reproduction. In cattle, most organs and body parts are formed between the 2nd and 6th week of gestation. During this period, the digestive tract, lungs, liver and pancreas develop from the primitive intestine, and the beginnings of the muscular, skeletal, nervous and urogenital system are established. In the course of development, the epithelial components of the digestive tract are derived from the endoderm that lines the primitive intestine and the connective and muscular components. Approximately 25 to 45% of bovine embryos are lost until the final implantation process. Due to the scarce literature related to organogenesis and the growth of technological innovations linked to bovine reproduction, the present study aims to study based on the normal development of the pancreas and liver of bovine embryos, thus generating a comparison for the understanding of numerous deformities and anomalies frequently encountered.