From which source do bronchial arteries originate, and what do they supply?

• A. From systemic circulation (usually from the aorta); supply conducting airways with oxygenated blood.
• B. From pulmonary arteries; supply the alveoli with deoxygenated blood.
• C. From internal thoracic arteries; supply visceral pleura with blood.
• D. From bronchial veins; drain the alveolar capillaries.

Answer: (A)