enteric nervous system or ens intrinsic autonomic anatomy outline diagram

enteric nervous system ens neural circuits motor functions structure anatomy blood flow mucosal secretions immune endocrine function autonomic gastrointestinal tract crest spinal cord vagus nerve prevertebral ganglia secretion neurotransmitter labeled educational scheme diagram vector illustration outline concept mucosa serosa muscularis gland mesentery tissue submucosa lumen duct muscle vein artery