Which best describes cardiac muscle?

Cardiac muscle is best described as striated and involuntary. This type of muscle tissue is found exclusively in the heart, where it plays a critical role in pumping blood throughout the body. The term "striated" refers to the unique striped appearance of cardiac muscle fibers, which is a characteristic similar to skeletal muscle. However, unlike skeletal muscle that is under conscious control (voluntary), cardiac muscle operates autonomously, meaning it contracts involuntarily. This ability to function independently is essential for maintaining a consistent heartbeat and ensuring proper circulation without requiring conscious thought. The autonomic nervous system regulates cardiac muscle, responding to various physiological demands and stressors to adjust heart rate and force of contraction accordingly.