Question

question 2 of 10
what are the first structures in the bronchial tree to conduct gas exchange?
secondary bronchi
tertiary bronchi
terminal bronchioles
respiratory bronchioles

Explanation:

• Secondary bronchi: Mainly for air conduction, not gas exchange.
• Tertiary bronchi: Also mainly for air conduction.
• Terminal bronchioles: Part of the conducting zone, no gas exchange.
• Respiratory bronchioles: Mark the beginning of the respiratory zone where gas exchange starts.

Answer:

Respiratory bronchioles