Human Anatomy Vol 1

THORAX

Fig. 19.7: Patent ductus arteriosus

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I Trachea, with the deep cardiac plexus and the
tracheobronchial lymph nodes.

(^2) Oesophagus. ,,
3 Left recurrent laryngeal nerve.
4 Thoracic duct.
5 Vertebral column.
Sufemor
1 Three branches of the arch of the aorta:
a. Brachiocephalic.
b. Left common carotid.
c. Left subclavian arterles (Fig. 19.10).
2 All three arteries are crossed close to their origin by
the left brachiocephalic vein.
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1 Bifurcation of the pulmonary trunk.
2 Left bronchus.
3 Ligamentum arteriosum with superficial cardiac
plexus on it.
4 Left recurrent laryngeal nerve.
Bronches
1 Brachiocephalic artery which divides into the right
common carotid and right subclavian arteries
(Fig.7e.2).
2 Left common carotid artery.
3 Left subclavian artery.
DESCENDINE IHO CIC AORTA
Descending thoracic aorta is the continuation of the arch
of the aorta. It lies in the posterior mediastinum
(see Fig.77.4).
Course
1 It begins on the left side of the lower border of the
body of the fourth thoracic vertebra.
2 It descends with an inclination to the right and
terminates at the lower border of the twelfth thoracic
vertebra.
Relolions
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1 Root of left lung.
2 Pericardium and heart.
Tortuous
intercostal
artery
(a)
Figs 19.6a and bl (a) Coarctation of aorta, and (b) notches on the ribs