Analysis of a didactical situation: comprehension of the health-disease process

The work describes a didactic situation that took place in the discipline of " Preventive Veterinary Medicine and Public Health" in a course of Veterinary Medicine, in the state of Santa Catarina, Brazil. The didactic situation examined the students' representation on health and disease seeking the development of a model to explain the phenomenon as a dynamic process. The situation was analyzed under the perspective of the objective-obstacle concept that was shown appropriate as a tool of interpretation of the process of understanding of the phenomenon health-disease for the students.