What is the overall function of smooth cardiac and skeletal muscle?

Smooth, cardiac, and skeletal muscles all play crucial roles in the body, but their functions differ. Skeletal muscle is responsible for voluntary movements and is attached to bones, allowing for locomotion and posture maintenance. Cardiac muscle, found only in the heart, is involuntary and enables the heart to pump blood throughout the body. Smooth muscle, located in walls of hollow organs like the intestines and blood vessels, also functions involuntarily to facilitate movement of substances within these organs.