Here's why:

* Tissues are groups of similar cells that work together to perform a specific function.

* Muscle tissue is made up of cells that can contract, which allows your body to move. There are different types of muscle tissue, including:

* Skeletal muscle: Attached to bones, responsible for voluntary movement.

* Smooth muscle: Found in the walls of internal organs like the stomach and intestines, responsible for involuntary movements.

* Cardiac muscle: Found only in the heart, responsible for pumping blood.

Let me know if you'd like to learn more about other types of tissues in the body!