* Elongated: Skeletal muscle fibers are long and cylindrical, giving them their elongated appearance.

* Arranged in Sheets: These fibers are bundled together into fascicles, which are then arranged in parallel sheets to form the muscles we know.

* Multiple Nuclei: Unlike other muscle types, skeletal muscle cells are multinucleated. This means they have many nuclei within each cell, which is a result of the fusion of multiple muscle precursor cells during development.

Other muscle types and their characteristics:

* Smooth muscle: These muscles are found in the walls of organs like the digestive tract and blood vessels. They are not elongated or arranged in sheets, and they have single nuclei.

* Cardiac muscle: Found only in the heart, these muscles have a branched, interconnected structure, are uninucleated, and have specialized junctions called intercalated discs that facilitate synchronized contraction.