Blood supply to the thoracic walls

Question 1

What controls diameter of airways/blood vessels

Answer 1

Sympathetic and parasympathetic nerves innervate smooth muscle and glands, controlling the diameter of the airways and blood vessels

Question 2

Thoracic arteries

Answer 2

Internal thoracic artery
Posterior and anterior intercostal arteries
Musculophrenic artery
Superior epigastric artery

Question 3

Thoracic veins

Answer 3

Posterior intercostal veins (drain into the azygos venous system)