Vagus nerve anatomy. Artwork of a human body from the side, showing the internal anatomy and the location of the vagus nerve (yellow). This nerve, also known as cranial nerve X or the pneumo-gastric nerve, ennervates the larynx (upper centre), the heart (not seen) and the stomach (lower right). It also ennervates some of the viscera of the abdomen, such as the intestines (bottom centre). Other body structures shown here include the trachea, the lungs, the mouth and nasal passages, the pancreas, the kidneys, the adrenal glands, the diaphragm, the rib-cage, the skull and backbone, and major arteries and veins.