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Question 1

What does the anterior part of the inferior mediastinum contain?

Answer 1

Thymus gland (bc it is big)
Lymph nodes
Fat (bc you can fat mostly from the anterior)

Question 2

When does the involution of the Thymus begin?

Answer 2

After puberty

Question 3

What does the middle mediastinum of the inferior mediastinum contain?

Answer 3

Heart within the pericardium

Roots of great vessels (aorta,pulmonary arteries and veins, SVC and IVC)

phrenic nerves

main bronchi

arch of azygous

Question 4

What are the 3 great branches of the aortic arch?

Answer 4

Left subclavian artery

Left common carotid artery

Left brachiocephalic trunk

Question 5

What is the key identification point to differentiate between the middle mediastinum and poster

Question 6

What does the posterior mediastinum?

Answer 6

Esophagus (#5) (with
vagal plexuses)

Descending aorta
and branches

 Azygos (#8) and
Hemiazygos venous systems

 Thoracic duct 

Sympathetic trunk
(#21) and

splanchnic nerves (#19)

Question 7

The superior vena cava is formed by the union of what veins? What are they considered?

Answer 7

Formed by: union of right and left brachiocephalic veins (bc brach is like branch, and cephalic bc the svc is close to cephalic, so the union of two branches)

Considered as: Roots of SVC