Which are the three types of muscles?

• A. Smooth, cardiac, skeletal
• B. Cardiac, skeletal, tendinous
• C. Nervous, muscular, skeletal
• D. Smooth, connective, skeletal

Answer: (A)

There are three muscle tissue types: smooth, cardiac, and skeletal. Smooth muscle lines the walls of hollow organs and blood vessels and operates involuntarily, without conscious control. Cardiac muscle makes up the heart; it contracts to pump blood and is also involuntary, with a specialized, striated structure. Skeletal muscle attaches to bones and is under voluntary control, allowing us to move our limbs and body.

The other options mix in non-muscle or incorrect tissue types. Tendinous refers to tendons, which connect muscle to bone, not a muscle type itself. Nervous and connective describe other tissues, not muscle tissue. So the combination of smooth, cardiac, and skeletal is the correct set.