Anatomy study note · Thorax

Pulmonary trunk

The vessel carrying deoxygenated blood from the right ventricle to the lungs. About 5 cm long, it divides in the concavity of the aortic arch into the right and left pulmonary arteries.

Key points

• Right ventricle → divides under the aortic arch.
• Right PA behind the aorta and SVC; left PA in front of the descending aorta.
• Segmental arteries run WITH the segmental bronchi.
• Ligamentum arteriosum = closed ductus arteriosus.
• Pulmonary arteries: 6th arch arteries.
• Ductus arteriosus → ligamentum arteriosum.
• Artery: intima / media (smooth muscle) / adventitia.
• Most named arteries are muscular; aorta is elastic.

The full note in the atlas also covers

Course · Branches · Histology · Development · Clinical notes

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Written from

• Snell’s Clinical Anatomy by Regions, 10th ed., ch. 5, PDF pp. 584, 645–647
• Inderbir Singh’s Human Embryology, ch. 15, PDF pp. 233, 249, 251, 275
• BRS Cell Biology & Histology, 7th ed., ch. 11, PDF pp. 197–199; ch. 15, PDF p. 280

More from the thorax

• Pulmonary valve
• Pulmonary veins
• Ribs
• Right atrium
• Right coronary artery
• Right ventricle
• Serratus posterior muscles
• Sternum
• Superior vena cava
• Sympathetic trunk
• Thymus
• Trachea

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