What are the following are tissues that can relax or contract?

The primary tissues that can relax or contract are muscle tissues, which include skeletal, cardiac, and smooth muscle. Skeletal muscle enables voluntary movements, while cardiac muscle contracts involuntarily to pump blood. Smooth muscle is found in organs and blood vessels, facilitating involuntary movements such as digestion and blood flow regulation. These tissues work together to enable various bodily functions through contraction and relaxation.