What type of muscles are primarily involuntary and found in hollow organs?

Smooth muscles are primarily involuntary and are found in the walls of hollow organs such as the stomach, intestines, bladder, and blood vessels. Unlike skeletal muscles, which are under voluntary control and responsible for body movements, smooth muscles operate automatically without conscious thought. This is crucial for functions such as digestion, where the movement of food through the digestive tract requires coordinated contractions. Smooth muscles do not have the striations found in skeletal muscles, which is why they are characterized as "smooth." This involuntary control allows the body to regulate essential processes continuously, adapting to physiological needs without the need for conscious adjustments.