What are the three types of muscle tissue?

• A. Cardiac, skeletal, and smooth
• B. Cardiac, skeletal, and vascular
• C. Striated, smooth, and skeletal
• D. Cardiac, smooth (organs) and skeletal

Answer: (D)

Three muscle tissue types exist: cardiac, smooth, and skeletal. Skeletal muscle attaches to bones, enabling voluntary movement and showing a banded appearance due to structured sarcomeres. Smooth muscle lines the walls of hollow organs and blood vessels, contracts slowly and involuntarily, and appears non-striated. Cardiac muscle makes up the heart walls, contracts rhythmically and involuntarily, and features intercalated discs that coordinate heartbeat. The option that lists cardiac, smooth (organs) and skeletal matches this standard grouping by naming all three tissue types and clarifying that smooth muscle occurs in organ walls. The other choices mix up terms or locations (for example, using vascular as a separate tissue type or calling smooth a distinct category), which does not reflect the true three-tissue classification.