It's found in the bronchioles of the lungs, it's found in the stomach, the small and large intestine, we can find it in the iris portion of the eye. We can also find in places like the bladder and the uterus, as well as other parts of the body. Now, smooth muscles are innervated by the autonomic system, autonomic nervous system, just like the cardiac muscles. And this basically means that just like cardiac muscle is involuntary, smooth muscle is also involuntary. And that means we have no way to actually consciously control the movement of smooth muscle. Now, recalling our discussion on skeletal muscle and cardiac muscle, we said that these two types of muscles consist of individual units we call sarcomeres.