Human Anatomy Vol 1

THORAX

Ascending

Pulmonary trunk

Left phrenic

Left vagus

Descending

Muscles of second intercostal space

lnternal thoracic vessels

Right pleura

Right lung

Right phrenic nerve

Superior vena cava

Right pulmonary artery

Right bronchus

Right vagus nerve

Oesophagus

Azygos vein

Thoracic duct

Fifth thoracic veftebra

Fig. 19.3: Transverse section of the thorax passing through the lifth thoracic vertebra

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ASCENDING AORTA

Origin ond Course

The ascending aorta arises from the upper end of the

left ventricle. It is about 5 cm long and is enclosed in

the pericardium (Fig. 19.2).

It begins behind the left half of the stemum at the

level of the lower border of the third costal cartilage.

It runs upwards, forwards and to the right and becomes

continuous with the arch of the aorta at the sternal

end of the upper border of the second right costal

cartilage.

Axillary veln

Lateral

thoracic ve n

Thoracoepigastric

vein

Superficial

epigastric vein

Great saphenous

vetn

Fig, 19.4: Obstruction to superior vena

opening of vena azygos

cava above the Fig. 19.5: Obstruction to superior vena cava below the

opening of vena azygos

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