Actual length of this mitochondria is 2 1/2 micrometers. The horizontal folds that form compartments inside the oval shape are called "cristae". Not visible on these folds are tiny globular particles (9 nanometers in diameter) that are attached by slender stalks that are 3 to 4 nanometers long, These particles contain the enzymes necessary to process ATP from glucose. The mitochodria organelles are constantly in motion inside the muscle tissue, and change shape from time to time.
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<---Electron Micrograph of a mitochondria cross-section<---Electron Micrograph of a mitochondria cross-section