Read the following statements regarding the human respiratory system: A. The conducting part transports atmospheric air to the alveoli and brings it to body temperature. B. The conducting part extends from the external nostrils up to the terminal bronchioles. C. All structures of the conducting part are supported by incomplete cartilaginous rings. Choose the correct option.

Step-by-step solution

According to NCERT, the part starting with the external nostrils up to the terminal bronchioles constitutes the conducting part. Thus, statement B is correct. The conducting part transports the atmospheric air to the alveoli, clears it from foreign particles, humidifies and also brings the air to body temperature. Thus, statement A is correct. The trachea, primary, secondary and tertiary bronchi, and initial bronchioles are supported by incomplete cartilaginous rings. The terminal bronchioles are part of the conduc