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Questions and Answers
From where do the bronchial arteries arise?
From where do the bronchial arteries arise?
What do the bronchial veins drain?
What do the bronchial veins drain?
How many capillaries are there per alveolus in the alveolar-capillary unit?
How many capillaries are there per alveolus in the alveolar-capillary unit?
Where do the pulmonary veins drain the remaining blood from?
Where do the pulmonary veins drain the remaining blood from?
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Which vessel supplies intrapulmonary structures proximal to the terminal bronchioles?
Which vessel supplies intrapulmonary structures proximal to the terminal bronchioles?
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Which arteries are also known as internal mammary arteries?
Which arteries are also known as internal mammary arteries?
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Where do the internal thoracic arteries provide blood supply to?
Where do the internal thoracic arteries provide blood supply to?
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What do the internal thoracic arteries branch off from?
What do the internal thoracic arteries branch off from?
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What is the drainage pathway for the blood supplied by the internal thoracic arteries?
What is the drainage pathway for the blood supplied by the internal thoracic arteries?
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What is the common name for the internal thoracic arteries?
What is the common name for the internal thoracic arteries?
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Which artery supplies the nasal cavity?
Which artery supplies the nasal cavity?
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What is the common site of chronic epistaxis?
What is the common site of chronic epistaxis?
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Which veins provide venous drainage of the nose?
Which veins provide venous drainage of the nose?
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What is considered the 'danger area' of the face?
What is considered the 'danger area' of the face?
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Which arteries supply the parietal pleura?
Which arteries supply the parietal pleura?
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Which arteries are responsible for supplying the larynx?
Which arteries are responsible for supplying the larynx?
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Where do the inferior thyroid arteries branch off from?
Where do the inferior thyroid arteries branch off from?
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What is the primary drainage route for the inferior thyroid veins?
What is the primary drainage route for the inferior thyroid veins?
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Which arteries are responsible for supplying the trachea?
Which arteries are responsible for supplying the trachea?
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What is the common variation in the origin of the right bronchial artery?
What is the common variation in the origin of the right bronchial artery?
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From where do the bronchial arteries arise?
From where do the bronchial arteries arise?
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Where do the bronchial veins drain the blood from?
Where do the bronchial veins drain the blood from?
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What is the source of blood for the bronchial veins?
What is the source of blood for the bronchial veins?
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Which structure creates an admixture of oxygenated and deoxygenated blood in the lungs?
Which structure creates an admixture of oxygenated and deoxygenated blood in the lungs?
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What does the posterior intercostal artery deliver blood to?
What does the posterior intercostal artery deliver blood to?
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What is the source of the bronchial arteries?
What is the source of the bronchial arteries?
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Where do bronchial veins drain the proximal part of the root of the lung?
Where do bronchial veins drain the proximal part of the root of the lung?
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What is the main function of the bronchial arteries in the lungs?
What is the main function of the bronchial arteries in the lungs?
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From which vessel do pulmonary veins supply oxygenated blood?
From which vessel do pulmonary veins supply oxygenated blood?
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Where do the tertiary branches of the pulmonary arteries branch from?
Where do the tertiary branches of the pulmonary arteries branch from?
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From where do the bronchial arteries arise?
From where do the bronchial arteries arise?
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What do the bronchial arteries supply?
What do the bronchial arteries supply?
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Where do the bronchial veins exit the lungs?
Where do the bronchial veins exit the lungs?
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What is the drainage function of the bronchial arteries?
What is the drainage function of the bronchial arteries?
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How many capillaries are there per alveolus in the alveolar-capillary unit?
How many capillaries are there per alveolus in the alveolar-capillary unit?
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Where do the pulmonary veins supply oxygenated blood?
Where do the pulmonary veins supply oxygenated blood?
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What type of blood does the bronchial vein drain?
What type of blood does the bronchial vein drain?
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Where do the bronchial veins drain the blood?
Where do the bronchial veins drain the blood?
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Which artery supplies intrapulmonary structures proximal to terminal bronchioles?
Which artery supplies intrapulmonary structures proximal to terminal bronchioles?
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Study Notes
Blood Supply to the Lungs
- Bronchial arteries arise from the thoracic aorta or the intercostal arteries.
- Bronchial veins drain into the azygos vein or the accessory hemiazygos vein.
- Each alveolus in the alveolar-capillary unit has around 1-3 capillaries.
Pulmonary Veins
- Pulmonary veins drain oxygenated blood into the left atrium.
Blood Supply to Intrapulmonary Structures
- Bronchial arteries supply intrapulmonary structures proximal to the terminal bronchioles.
- Bronchial arteries have a dual function: oxygenating the lung tissue and providing oxygenated blood to the bronchi.
Blood Supply to the Nasal Cavity
- The nasal cavity is supplied by the nasal branches of the sphenopalatine artery.
- The common site of chronic epistaxis (nosebleed) is Kiesselbach's plexus.
- Veins providing venous drainage of the nose include the facial vein and the ophthalmic vein.
Blood Supply to the Parietal Pleura and Larynx
- Parietal pleura is supplied by the posterior intercostal arteries.
- The larynx is supplied by the laryngeal branches of the superior thyroid artery.
Inferior Thyroid Arteries and Veins
- Inferior thyroid arteries branch off from the thyrocervical trunk.
- Inferior thyroid veins drain into the brachiocephalic veins.
Tracheal Blood Supply
- The trachea is supplied by the tracheal branches of the inferior thyroid arteries.
Important Variations and Features
- The right bronchial artery may arise from the third or fourth posterior intercostal artery (common variation).
- The internal thoracic arteries branch off from the subclavian artery and provide blood supply to the anterior chest wall.
- The internal thoracic veins drain into the brachiocephalic vein.
- The "danger area" of the face is the area drained by the facial vein, which can cause infections to spread to the brain.
- The bronchial veins create an admixture of oxygenated and deoxygenated blood in the lungs.
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Description
Test your knowledge of the pulmonary blood supply and drainage system with this anatomy quiz. Explore the posterior intercostal artery, bronchial veins, and the systemic pressures involved in this intricate process.
