EM of smooth muscle cells close to nerve axons in transverse section. Several smooth muscle cells (Sm) are in the field of view; one is sectioned at the level of its nucleus (N). A group of unmyelinated axons (Ax) supported by the process of a Schwann cell (SC) is seen in surrounding interstitial connective tissue. An axonal varicosity contains a cluster of synaptic vesicles (SV). 37,000×.