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Question 1

Differentiate between external and internal respiration

Answer 1

• External: refers to the process that occurs within the lungs involving the exchange of O2 and CO2
• Internal: Gas exchange of the tissue level, where O2 is delivered and CO2 is removed.

Question 2

Differentiate between conductive and respiratory zone

Answer 2

1. Conductive: transports filtered air to the lungs.
   * Consists of mouth and nose; pharynx; larynx; trachea; primary and secondary bronchi; and tertiary bronchioles and terminal bronchioles.
2. Respiratory: where gas exchange occurs.
   * Bronchioles, alveolar ducts, and the alveolar sacs are all structures of this zone that are involved with the exchange of gases between inspired air and the blood.