Which One of the Following Structures Is NOT Part of the Respiratory

question 51

Multiple Choice

Which one of the following structures is NOT part of the respiratory zone?

• A) respiratory bronchioles
• B) alveolar ducts
• C) alveolar sacs
• D) alveoli
• E) primary bronchus

---

Definitions:

Ions

Atoms or molecules with a net electrical charge due to the loss or gain of one or more electrons.

Gases

Substances that can expand freely to fill any space available, irrespective of its quantity.

Subatomic Particles

Particles smaller than atoms, including protons, neutrons, and electrons, which make up the atom's structure.

Electrons

Negatively charged particles present in every atom that function as the main conduits for electrical current in solid materials.