What is the "powerhouse" of the Eukaryotic animal cell?

Mitochondria are considered the powerhouse of the eukaryotic animal cell because they are responsible for generating the majority of the cell's energy in the form of adenosine triphosphate (ATP) through a process called cellular respiration. This double-membrane-bound organelle contains its own DNA and is involved in various metabolic functions, including the oxidation of organic molecules to produce ATP. The high concentration of mitochondria in cells with high energy demands, such as muscle cells, highlights their crucial role as the primary site of energy production in eukaryotic animal cells.