How many types of muscle are there?

There are three main types of muscle tissue: skeletal, smooth, and cardiac. Skeletal muscle is primarily responsible for voluntary movements and is attached to bones. It features striated fibers and is under conscious control. Smooth muscle, found in the walls of hollow organs like the intestines and blood vessels, is involuntary and has a non-striated appearance. Finally, cardiac muscle is unique to the heart; it shares characteristics with both skeletal and smooth muscles but is specialized for continuous and rhythmic contractions to pump blood throughout the body.

The options representing two, four, or five types are incorrect, as they do not encompass the standard classification recognized in human anatomy. Therefore, the answer indicating three types accurately reflects the foundational understanding of muscle types in biology.