What is ctn muscle?

As an AI language model, I don't have access to the context of the term "ctn muscle", and it is unclear if it's a correct term or a typo. However, it is possible to provide brief information about the term "muscle". A muscle is a soft tissue found in almost all animals' bodies, including humans. It is responsible for producing force and movement in the body, enabling us to move and perform physical activities. There are three types of muscles: skeletal, cardiac, and smooth, each with unique functions and characteristics. Skeletal muscles are responsible for voluntary movements like walking, running, and lifting weights, while cardiac and smooth muscles are involved in involuntary movements related to body functions such as the beating of your heart and digestion.