Which type of muscle tissue is involuntary and found in the walls of internal organs?

Smooth muscle tissue is characterized by its involuntary control and is primarily found in the walls of internal organs, such as the intestines, bladder, and blood vessels. This type of muscle operates without conscious control, allowing for automatic processes such as digestion and blood flow regulation.

The structure of smooth muscle fibers is non-striated, which differentiates it from skeletal muscle and cardiac muscle. While skeletal muscle is striated and under voluntary control, cardiac muscle is uniquely striated and involuntary, found exclusively in the heart. The involuntary nature of smooth muscle makes it essential for the functioning of various organ systems without requiring conscious thought. This allows the body to maintain essential physiological functions seamlessly.