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Questions and Answers
Which vein is formed by the union of the right subclavian and right internal jugular veins?
Which veins carry oxygenated blood to the left atrium of the heart?
What is the main component of the Azygos system of veins?
Where does the inferior vena cava enter the heart?
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From which veins is the superior vena cava formed?
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What is the primary function of the aorta?
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Where does the ascending aorta begin?
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Which vessels branch from the pulmonary trunk?
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What connects the ascending aorta with the descending aorta?
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What does the descending thoracic aorta become as it passes through the diaphragm?
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Study Notes
Large Veins of the Thorax
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Branchiocephalic Veins
- Formed by the union of subclavian and internal jugular veins
- Right branchiocephalic vein: formed by union of right subclavian and right internal jugular veins
- Left branchiocephalic vein: formed by union of left subclavian and left internal jugular veins
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Superior Vena Cava
- Formed by the union of the two branchiocephalic veins
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Azygos Veins
- Consist of main Azygos vein, inferior Hemiazygos vein, and superior Hemiazygos vein
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Inferior Vena Cava
- Enters the right atrium of the heart through the diaphragm
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Pulmonary Veins
- Carry oxygenated blood to the left atrium of the heart
Large Arteries of the Thorax
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Aorta
- Delivers oxygenated blood from the left ventricle of the heart to the tissue of the body
Ascending Aorta
- Begins at the base of the left ventricle
- Has three bulges: sinuses of the aorta, which give rise to the coronary artery
Arch of the Aorta
- Forms the connection between the ascending and descending aorta
Descending Thoracic Aorta
- Descends through the mediastinum
- Passes through the diaphragm to become the abdominal aorta
- Has an aortic opening
Pulmonary Trunk
- Conveys deoxygenated blood from the right ventricle of the heart to the lungs
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Branches
- Right pulmonary artery: supplies the right lung
- Left pulmonary artery: supplies the left lung
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Description
This quiz covers the major veins found in the thorax region, including branchiocephalic veins, superior vena cava, and azygos veins. It explains their formation and composition.
