Skeletal Muscle:Skeletal muscle is a type of striated muscle tissue which is under the voluntary control of the somatic nervous system; it's what most people think of as muscle, involved in locomotion.
Posture: Posture refers to the alignment and positioning of the body with respect to gravity, whether standing, sitting or lying down; it's significantly influenced by axial muscles.
Spinal Column: The spinal column is a series of vertebrae extending from the skull to the lower back, providing major support for the body's skeletal structure and protecting the spinal cord