Some aspects of mitochondria having a "septum".
D002001:Adipose Tissue, Brown / Q000648:ultrastructure; D000302:Adrenal Cortex / Q000648:ultrastructure; D000818:Animals; D002417:Cattle; D006168:Guinea Pigs; D008566:Membranes / Q000648:ultrastructure; D051379:Mice; D008928:Mitochondria / Q000502:physiology / Q000648:ultrastructure*; D008930:Mitochondria, Liver / Q000648:ultrastructure; D009206:Myocardium / Q000648:ultrastructure