Smooth muscles or involuntary muscles control involuntary movements. They are also found in the iris of the eye, in ureters and in the bronchi of the
lungs. The cells are long with pointed ends (spindle-shaped) and uninucleate (having a single nucleus). They are also called unstriated muscles – why would they be called that?
NCERT Class IX
Sciences - Main Course Book
Chapter 6. Tissues