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2 years ago

11

In the respiratory system certain structures allow air to pass from the trachea to the lungs. They are lined with thin muscles a

nd coated with epithelial cells. These structures are called
A. bronchial tubes.
B. alveoli.
C. bronchioles.
D. lobules.

1 answer:

steposvetlana [31]2 years ago

4 0

Answer:

I think my answer is

C. bronchioles.

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