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Where are mitochondria located inside eukaryotic cells?
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mitochondrion
Mitochondria (red) are found throughout the cytoplasm of almost all eukaryotic cells (cell nucleus is shown in blue; cytoskeleton is shown in yellow).
Mitochondria are located within the cytoplasm of almost all eukaryotic cells. They are suspended in the cytosol, which is the fluid portion of the cytoplasm external to the nucleus.12
Within the cell, mitochondria are often found closely packed in regions that are actively using metabolic energy. While they are present in the cells of nearly all eukaryotic organisms—including plants and animals—the number of mitochondria per cell varies significantly based on the cell's energy requirements. For instance, cells that demand high amounts of energy, such as muscle or liver cells, may contain hundreds or thousands of mitochondria, whereas other cells, such as mature red blood cells, lack them entirely.314