ANATOMY

Detailed explanation-1: -Skeletal muscle is not involved in: Propulsion of a substance through a body tube.

Detailed explanation-2: -Each of these muscles is a discrete organ constructed of skeletal muscle tissue, blood vessels, tendons, and nerves. Muscle tissue is also found inside of the heart, digestive organs, and blood vessels. In these organs, muscles serve to move substances throughout the body.

Detailed explanation-3: -The main functions of skeletal muscle are to contract to produce movement, sustain body posture and position, maintain body temperature, store nutrients, and stabilize joints.

Detailed explanation-4: -Smooth muscles lie mainly in the walls of hollow viscera, such as the stomach and intestines, where they help to propel substances through these organs.