Question

1. Describe pulmonary ventilation, including the primary muscles involved in inspiration and explain why air flows into the lungs when these muscles contract.

2. Describe the structures and organs of the conducting zone

Answer 1

1. Pulmonary Ventilaton - It is the process of inhalation of air inside lung and exhalation of air outside.

Primary muscle of inspiration - Diaphragm and external intercostal.

Expiration is primarily a passive process.

Contraction of diaphram and exexternal intercostal kuscle creates negative transpulmonary pressue hence air is sucked inside the alveoli.

2. Conducting zone consist of - trachea to terminal bronchiole.

Trachea --> Left and rigjt main bronchus--> secondary bronchus / lobar bronchus --> Tertiary bronchiole (segmental bronchus) --> Terminal Bronchiole --> Respiratory Bronchiole --> alveolar sac with lobules.