Volume 1
On the anatomy, physiology, and pathology of the chimpanzee / by Charles F. Sonntag.
- Sonntag, Charles F. (Charles Frederick), -1925
- Date:
- 1923
Licence: In copyright
Credit: On the anatomy, physiology, and pathology of the chimpanzee / by Charles F. Sonntag. Source: Wellcome Collection.
84/118 page 404
![The left thoracic vagus (text-fig. 45 B) has the same relations and course till it reaches the posterior aspect of the pulmonary root as in Man. It gives off* recurrent (e), cardiac (/), and anterior pulmonary nerves. Behind the root of the left lung it gives off posterior pulmonary nerves. It does not break up into the posterior pulmonary plexus as it does in Man. Leaving the back of the root of the lung it gains the front of the oesophagus, which position it maintains into the abdomen. It supplies the oesophagus and pleura and communicates with the right vagus. The right thoracic vagus (text-fig. 45 B) gets into the thorax after crossing the right subclavian artery, at which point it gives off its recurrent branch. It crosses the right side of the trachea Text-figure 45. The vagus and sympathetic nerves. A : cervical parts of the left vagus and sympa- thetic ; B : thoracic parts of the left vagus and the cervical and thoracic parts of the right vagus and sympathetic. Letters in text. from before backwards and it is crossed by the vena azygos major. It passes down the back of the right pulmonary root and inclines downwards and backwards to reach the dorsal aspect of the oesophagus. There is no plexus guise. It gives off three cardiac nerves (/), three anterior pulmonary (</'), two tracheal (T.B), two posterior pulmonary (h), and several oesophageal nerves. Abdominal Parts of the Vagi (text-fig. 46) :—The left vagus passes through the anterior part of the oesophageal opening in the diaphragm, and divides into two. One branch divides into twigs which run along the lesser curvature as far as the pyloric antrum. The other branch gives twigs along the lesser curvature, [82]](https://iiif.wellcomecollection.org/image/b2982123x_0001_0084.jp2/full/800%2C/0/default.jpg)
