What are lines C pointing to?

Question

Quizplus · Accepted Answer

Lines C are pointing to the alveolar ducts, which are structures that connect the respiratory bronchioles to the alveolar sacs. These ducts are responsible for delivering air to the sacs, where gas exchange occurs between the air and the blood vessels surrounding the alveoli. Option A is incorrect because the terminal bronchiole is located before the respiratory bronchiole. Option B is incorrect because the respiratory bronchioles are located before the alveolar ducts. Option D is incorrect because the alveolar sacs are located after the alveolar ducts. Option E is incorrect because the alveoli are the tiny air sacs where gas exchange occurs, but they are not directly pointed to by the lines C.

What Are Lines C Pointing To