American Academy of Professional Coders (AAPC) Practice Exam

Muscle tissue is the type of tissue primarily responsible for producing movement in the body. This tissue is specialized for contraction and consists of muscle cells that contract in response to stimuli, enabling various forms of motion. There are three types of muscle tissue: skeletal muscle, which is under voluntary control and moves bones; cardiac muscle, which is found in the heart and is involuntary; and smooth muscle, which is found in the walls of hollow organs and is also involuntary.

The ability of muscle tissue to contract and exert force allows it to perform actions ranging from walking and running to involuntary movements like the beating of the heart or digestion. Its role in facilitating movement is crucial for all bodily functions, making it distinct from other types of tissues such as nerve, epithelial, and connective tissue, which have different primary functions like signaling, protection, and support.