19 THORACIC AORTA
O: Located between the aortic arch & the abdominal aorta.
S: - 3rd - 11th intercostal spaces, lateral and posterior thoracic walls, the vertebral column with the spinal cord and meninges, part of the diaphragm & the lungs.
Course
- 1. begins at the level of the 3ʳᵈ thoracic vertebra as the continuation of the aortic arch
- 2. descends on the left side of the vertebral column and oesophagus
- 3. subsequently it gets between the vertebral column and oesophagus
- 4. terminates by passing via the aortic hiatus at the level of the 12ᵗʰ thoracic vertebra (continues as the abdominal aorta)
* Ben Made Every 1 Person Suffer.
- Thoracic Aorta
- parietal branches (2)
- Posterior intercostal arteries S: the chest muscles
- anterior from internal thoracic of subclavian artery
- - single arteries - from 3-11
- - Each artery gives its collateral branch at the level of the angle of the corresponding rib.
- - They anastomose with ant. intercostal arteries at the level of costochondral junction
- Subcostal a pair of arts running below the 12th rib.
- Superior phrenic artery. S: the superior surface of the diaphragm
- visceral branches (4)
- Bronchial branches S: the tissues of the lungs
- esophageal branches S: Esophagus
- Pericardiac S: the pericardium
- Mediastinal S: mediastinal organs (trachea, thyroid ") & connective T