Which of the following lists the three types of muscles?

• A. Skeletal, smooth, cardiac
• B. Skeletal, ligamentous, cardiac
• C. Cardiac, smooth, tendinous
• D. Skeletal, smooth, striated

Answer: (A)

The three types of muscles in the human body are skeletal, smooth, and cardiac. Skeletal muscle is attached to bones and is responsible for voluntary movements. It is under conscious control and allows for activities such as walking and lifting. Smooth muscle, found in the walls of hollow organs like the intestines and blood vessels, operates involuntarily, controlling functions such as digestion and blood flow. Cardiac muscle, found only in the heart, is also involuntary and is specialized for continuous rhythmic contractions that pump blood throughout the body.

This knowledge is foundational in anatomy and physiology, making it crucial for understanding how body systems operate in health and disease. The other options mentioned different types of tissues or muscle descriptors incorrectly, such as "ligamentous" or "tendinous," which do not represent muscle types, and "striated," which is actually a characteristic of skeletal and cardiac muscle rather than a separate type. Thus, option A accurately identifies the three distinct and essential types of muscle in the body.