The organs system composed of tissue that can contract and relax?

The organ system composed of tissue that can contract and relax is the muscular system. It includes three types of muscle tissue: skeletal, smooth, and cardiac. Skeletal muscles are responsible for voluntary movements, smooth muscles control involuntary movements in organs, and cardiac muscle is specific to the heart, facilitating its pumping action. Together, these muscles enable movement, maintain posture, and regulate various bodily functions.