4 LAYERS OF OESOPHAGEAL WALL
- Mucosa : lined by non keratinised stratified squamous epithelium
- Submucosa :
- Muscularis externa : Toughest layer;Upper 1/3 has skeletal muscle;lower 1/3 has smooth muscle;middle 1/3 has both skeletal and smooth muscles
- Serosa
4 CONSTRICTIONS OF OESOPHAGUS
- @ 15cm (from incisors)>> @ pharyngoesophageal jn>>c6 level
- @23cm>> @ crossing of arch of aorta
- @27 cm>> @ left bronchus crossing
- @40cm>> @ piercing of diaphragm
5 BLOOD SUPPLY
- Bronchial artery
- Inferior thyroid artery
- Descending thorasic aorta
- Left gastric artery
- Left inferior phrenic artery
6 LENGTH OF OESOPHAGUS
- 15cm
