Mitochondria play a central role in apoptosis, a programmed cell death process essential for development, tissue homeostasis, and removal of damaged cells. Mitochondria regulate apoptosis by modulating calcium signaling, mitochondrial fusion and fission, and the release of pro-apoptotic factors such as cytochrome c. Calcium ions are critical in apoptosis, with their accumulation in mitochondria triggering mitochondrial permeability transition pore (PTP) opening, leading to mitochondrial dysfunction and apoptosis. The Bcl-2 family of proteins, including pro-apoptotic and anti-apoptotic members, regulate mitochondrial morphology and function, influencing the balance between fusion and fission. Mitochondrial fusion and fission are tightly regulated by proteins such as mitofusins, Opa1, Fis1, and Drp1, which control mitochondrial shape and function during apoptosis. Mitochondrial fragmentation is associated with apoptosis, as it facilitates the release of pro-apoptotic molecules and the activation of caspases. The interplay between mitochondrial calcium handling, fusion, and fission machinery is crucial for the execution of apoptosis. Recent studies highlight the complex roles of these processes in apoptosis, with mitochondrial fission being essential for the progression of the apoptotic pathway. The regulation of mitochondrial dynamics by Bcl-2 family proteins and mitochondrial-shaping proteins is critical for apoptosis, with implications for various diseases. Understanding the mechanisms underlying mitochondrial function and apoptosis is essential for developing therapeutic strategies for apoptosis-related disorders.Mitochondria play a central role in apoptosis, a programmed cell death process essential for development, tissue homeostasis, and removal of damaged cells. Mitochondria regulate apoptosis by modulating calcium signaling, mitochondrial fusion and fission, and the release of pro-apoptotic factors such as cytochrome c. Calcium ions are critical in apoptosis, with their accumulation in mitochondria triggering mitochondrial permeability transition pore (PTP) opening, leading to mitochondrial dysfunction and apoptosis. The Bcl-2 family of proteins, including pro-apoptotic and anti-apoptotic members, regulate mitochondrial morphology and function, influencing the balance between fusion and fission. Mitochondrial fusion and fission are tightly regulated by proteins such as mitofusins, Opa1, Fis1, and Drp1, which control mitochondrial shape and function during apoptosis. Mitochondrial fragmentation is associated with apoptosis, as it facilitates the release of pro-apoptotic molecules and the activation of caspases. The interplay between mitochondrial calcium handling, fusion, and fission machinery is crucial for the execution of apoptosis. Recent studies highlight the complex roles of these processes in apoptosis, with mitochondrial fission being essential for the progression of the apoptotic pathway. The regulation of mitochondrial dynamics by Bcl-2 family proteins and mitochondrial-shaping proteins is critical for apoptosis, with implications for various diseases. Understanding the mechanisms underlying mitochondrial function and apoptosis is essential for developing therapeutic strategies for apoptosis-related disorders.