* Structure: Muscle cells have a unique elongated shape and internal structure that allows for contraction and movement. They contain specialized proteins like actin and myosin that slide past each other to generate force.

* Function: Muscle cells are specifically designed to contract and relax, enabling movement of the body and internal organs.

* Energy Requirements: Muscle cells have a high demand for energy (ATP) to support their contractile function. They contain many mitochondria, the powerhouses of the cell, to produce this energy.

In contrast to general cells that perform a variety of functions, muscle cells are highly specialized for a single, specific function: movement.