1. The arrangement and organization of the inner components or elements of something
The internal structure of the building was damaged by the fire.
A estrutura interna do prédio foi danificada pelo incêndio.
2. In biology, the anatomical composition of an organism or organ
Scientists studied the internal structure of the cell.
Os cientistas estudaram a estrutura interna da célula.
3. The fundamental organization or framework of a system, institution, or concept
The company's internal structure needs to be reorganized.
A estrutura interna da empresa precisa ser reorganizada.