Anatomy esophagus
esophagus in neck - arteries?
inferior thyroid arteries
esophagus in neck - veins?
inferior thyroid veins
esophagus in abdomen - lymph drainage?
into left gastric nodes
esophagus in thorax - veins?
• upper 1/3 --> into azygos vein • lower 1/3 --> into left gastric vein (tributary of portal vein)
esophagus in thorax - lymph drainage?
• upper 1/3 --> into superior and posterior mediastinal nodes • lower 1/3 --> nodes along left gastric blood vessels + celiac nodes in abdomen
esophagus in thorax - arteries?
• upper part --> descending thoracic aorta • lower 1/3 --> left gastric artery
esophagus in thorax - nerve supply?
• vagal trunks --> left vagus lies anterior + right vagus lies posterior • esophageal plexus • sympathetic trunks • greater splanchnic nerves
esophagus in thorax - posterior relations ?
• vertebral column • thoracic duct (a.k.a left lymphatic duct) • azygos veins • right posterior intercostal arteries • descending thoracic aorta
esophagus pierce diaphragm - at what level?
T10
esophagus in neck - lymph drainage?
deep cervical LNs
esophagus in abdomen ?
enter abdomen through opening in right crus of diaphragm
esophagus in thorax?
it passes through mediastinum --> enter abdominal cavity (by piercing diaphragm) -->short course (1.25 cm) before entering stomach
esophagus starts at?
level of cricoid cartilage in neck (C6) --> descend in midline behind trachea
esophagus in abdomen - nerve supply?
• anterior and posterior gastric nerves (vagi) • sympathetic branches of thoracic part of sympathetic trunk
esophagus in thorax - left side relations?
• aortic arch • left subclavian artery • thoracic duct • mediastinal pleura
esophagus in abdomen - blood supply?
• arteries --> branches from left gastric artery • veins --> left gastric vein (tributary of portal vein)
Function of esophagus?
• conducts food from pharynx into stomach • wave-like contractions of muscular coat (peristalsis) --> propel food onward
esophagus in abdomen - relations?
• it lies posterior to left lobe of liver + anterior to left crus of diaphragm • on anterior surface --> left vagi • on posterior surface --> right vagi
esophagus in thorax - laterally, right side relations?
• mediastinal pleura • azygos vein
characteristics of esophagus?
• muscular tube , 25cm • extends from pharynx to stomach • 3 parts in neck, thorax and abdomen
esophagus in neck - posterior relations?
• prevertebral muscles • vertebral columns
esophagus in neck - nerve supply?
• recurrent laryngeal nerves • branches from sympathetic trunks
esophagus in neck - lateral relations?
• thyroid glands • carotid sheath --> common carotid artery + internal jugular vein + vagus nerve • on left side --> thoracic duct
esophagus in thorax - anterior relations?
• trachea • left recurrent laryngeal nerve • left bronchus • left atrium of heart
esophagus in neck - anterior relations?
• trachea • recurrent laryngeal nerves