Question

Which of the following is NOT part of the respiratory portion of the respiratory tract? 1....

Which of the following is NOT part of the respiratory portion of the respiratory tract?

1. Alveolar duct

2. Terminal bronchiole

3. Respiratory bronchiole

4. Alveolar sac

5. 2 and 3

Science   Anatomy-And-Physiology   
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Homework Answers

Answer #1

The respiratory tract has the function of gaseous exchange in living beings. The respiratory tract has been divided into two portions i,e conducting portion and respiratory portion. The conducting portion of the respiratory tract helps in the transfer of air. It does not take part in gaseous exchange. It involves nose, nasal cavity, pharynx, larynx trachea and terminal bronchioles. These organs help the air to move in and out of lungs.
The respiratory portion involves gaseous exchange. It includes respiratory bronchioles, alveolar ducts and alveoli. These organs help inhaled oxygen to diffuse into lung capillaries and carry carbon dioxide out.

Hence the option (2. Terminal bronchioles) is correct.

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