Arterial supply of the thorax

Question 1

Question 2

First part of the aorta

Answer 2

Ascending aorta

Question 3

Ascending aorta start site

Answer 3

• upper portion of the base of the left ventricle
• on level of left 3rd costal cartilage
• Posterior to left half of sternum

Question 4

Question 5

Ascending aorta runs within

Answer 5

Fibrous and serous pericardium

Question 6

Aortic arch is part of the aorta

Answer 6

between the ascending and descending aorta

Question 7

Aortic arch begins and ends

Answer 7

at T4/5 (sternal angle)

Question 8

Aortic arch has three major branches

Answer 8

1. Brachiocephalic trunk (largest)
2. L common carotid
3. L subclavian

Question 9

1. Brachiocephalic trunk (largest)

Answer 9

To the right and slightly anterior to other 2 branches

Question 10

Ascend together

Answer 10

Left common carotid and left subclavian artery

Question 11

Descending thoracic aorta begins

Answer 11

at T4/5 on the left

Question 12

Descending thoracic aorta descends

Answer 12

• on left side of vertebral bodies
• posterior to the root of the left lung

Question 13

Descending thoracic aorta goes through the diaphragm

Answer 13

In the aortic hiatus
- T12

Question 14

Descending thoracic aorta branches

Answer 14

• Pericardial artery
• Bronchial artery
• oesophageal artery
• mediastinal artery
• Posterior intercostal artery
• Subcostal artery
• Superior phrenic artery

Question 15

Question 16

Internal thoracic artery arises

Answer 16

in the root of the neck from the inferior surface of the first part of the subclavian arteries

Question 17

Internal thoracic artery descends

Answer 17

• into the thorax
• posterior to the clavicle and first costal cartilage
• Descends on the internal surfaces of the thorax, slightly lateral to the sternum and posterior to the upper 6 costal cartilages

Question 18

After descending past the second costal cartilage, the internal thoracic arteries

Answer 18

run anterior to the transversus thoracic muscles

Question 19

internal thoracic arteries terminate

Answer 19

• in the 6th intercostal space
• by dividing into the:
  Superior epigastric artery
  Musculophrenic artery

Question 20

internal thoracic arteries also directly give rise to

Answer 20

The anterior intercostal arteries of the sup. 6 intercostal spaces