Mitochondrial structure is the academic concept and research field dedicated to investigating the physical organization and arrangement of components within mitochondria. This encompasses the detailed examination of their double membrane system, intermembrane space, matrix, cristae morphology, and the spatial distribution of associated protein complexes, often utilizing advanced imaging and biochemical techniques to understand the relationship between ultrastructure, dynamics, and organelle function. Understanding mitochondrial structure is crucial for elucidating cellular energy metabolism, signaling pathways, and the pathogenesis of various diseases.