And we have smooth muscle, for example, found lining our blood vessels. Now, cardiac and smooth muscle is controlled by the autonomic nervous system and the smallest unit of the cardiac muscle and the skeletal muscle is known as the sarcomere. Smooth muscle does not consist of the sarcommir. So in this lecture, we're going to discuss the smallest functional unit of the skeleton muscle and the cardiac muscle known as the sarcomire. So what exactly does the sarcomire actually look like? Well, this diagram basically describes our sarcomir.