Topography , Contour & Normal Constrictions of Esophagus
Cervical esophagus ： continuation of the pharynx
at the level of 6th cervical vertebra ( C6 )
lower portion of the neck → superior and
posterior mediastina of the thorax 、、、
On each side the carotid sheath and the structures
it contains accompany the cervical esophagus.
The lobes of the thyroid gland partially overlap the
esophagus on each side.
Thoracic esophagus : To lie posterior to the trachea as far as the level
of the 5th thoracic body, where the trachea bifurcates.
The trachea slightly deviates to the right at its lower end,
so the left main bronchus crosses in front of the esophagus.
Below this point the esophagus is seperated from the left
atrium of the heart by the pericardium. In the lowest of
thoracic esophagus passes behind the diaphrgm to
Abdominal esophagus : → esophageal hiatus of the diaphragm →
to join the cardia of the stomach at the
level of 10th thoracic vertebra ( T10 )
( The esophagogastric junction ) 、、、
Viewed from the front ： assumes a form of
gentle reversed "S" . The upper 2 lateral curvatures
is convex toward the left; the lower thorax and
abdomen is toward the right.
Anterior to the cervical esophagus lies the membranous
wall of the trachea loosely connected by areolar tissue.
Posteriorly, the esophagus lies upon the vertebral
bodies and the longus colli mm. with fascia intervening.
In the grooves on each sides between them ascend the recurrent laryngeal nerves.
Vasculature of Esophagus : Blood Supply, Venous Drainage &
Lymphatic Drainage of Esophagus
Histology of Esophagus