Innervation is the supply of nerve fibers to and from an organ or to arouse or stimulate (a nerve or an organ) to activity.  For instance, Henry Gray’s Anatomy of the Human Body, says: ” The sympathetic nervous system (Fig. 838) innervates all the smooth muscles and the various glands of the body, and the striated muscle of the heart.”
- Daintith, J., & Martin, E. A. (Eds.). (2010). A dictionary of science. Oxford University Press, USA.
- Fig. 838 by Henry Gray (1825–1861). Anatomy of the Human Body. 1918.