2. - Arch of Aorta is continuation of asc aorta at sternal
angle
- Begins and terminates at sternal angle
- Connects ascg & descg aorta
- Arches over root of left lung
- Situated in sup mediastinum behind manubrium
- Summit of arch reaches level of middle of manubrium
Introduction
3.
4. Course
- Begins as continuation of ascg aorta behind Rt
2nd
chondrosternal joint
- Passes up, back and left infront of bifurcation
of trachea
- finally turns backwards & downwards behind
the left bronchus n continues as descg aorta at
lower border of T4 V
9. Anterior & to left –
Lt pleura & lung
Lt phrenic N
left cardiac nerves
(Inf cervical cardiac br of Xth N
Sup cervical cardiac br Symp trunk
Lt vagus
Lt Rec laryngeal N hooks upwards
below arch of aorta
Lt sup IC vein
10. Posterior & to right –
Trachea with deep cardiac plexus
Oesophagus
Lt Rec laryngeal nerve
Thoracic duct
Vertebral column
11. Inferior
• Left bronchus
• Bifurcation of pul trunk
• Lig arteriosum
• Left recurrent laryngeal
nerve
• Sup cardiac plexus
13. Branches
- Rt brachiocephalic trunk
– div into Rt CC & Rt SC artery
- Lt common carotid artery
- Lt subclavian artery
- Occasionally Thyroidea
Ima A & Vertebral A