Why is a respiratory system necessary ?

With regard to the respiratory system and the process of respiration in man, answer the following questions: Name the two muscles that help in breathing.

The conducting part of the respiratory system is

Diffustion of gases occurs in the alveolar region only and not in the other parts of respiratory system. Why?

Diffusion of gases occurs in the alveolar region only and not in the other parts of respiratory system. Why?

The epithelial lining of respiratory system in frog is derived by

Conducting part of human respiratory system does not include

The ultimate end parts of the respiratory system in humans are known as

During the exchange of gases in the human respiratory system ,Carbon dioxide is transported from tissues to respiratory surface by only

Which structure in human respiratory system is involved in conditioning of air?

Which of the following part of respiratory system form exchange part?