Define sliding filament theory of muscle contraction

Explanation:
The sliding filament theory of muscle contraction can be understood as the theory explaining the mechanism of muscle contraction at a cellular level.
Human body has about 650 skeletal muscles, which is nothing but the fibers responsible for movement .
This theory can be defined as the theory suggesting the importance of contraction of actin and myosin filaments of striated muscles resulting in overlapping and thus shortening of the muscle fiber’s length.
The thin actin filaments combine with the thick myosin filaments in order to conduct and regulate the cellular movements.

Final Answer:
Hence this is how one may conceptually define sliding filament theory of muscle contraction.