PATHOLOGY

Detailed explanation-1: -The movements your muscles make are coordinated and controlled by the brain and nervous system. The involuntary muscles are controlled by structures deep within the brain and the upper part of the spinal cord called the brain stem.

Detailed explanation-2: -Muscle contraction is the tightening, shortening, or lengthening of muscles when you do some activity. It can happen when you hold or pick up something, or when you stretch or exercise with weights. Muscle contraction is often followed by muscle relaxation, when contracted muscles return to their normal state.

Detailed explanation-3: -As organs that contain cells that can contract, muscles can generate force and movement. Skeletal muscle works in conjunction with the bones of the skeleton to create body movements. Additionally, it is also associated with the diaphragmatic, esophageal, and eye muscles.