Respiratory Tract Flashcards
Lower respiratory tract consists of
Trachea, bronchi, (primary, secondary & tertiary) bronchioles and alveoli
Upper respiratory tract consists of
Nose, nasal cavity, para-nasal sinuses, pharynx and larynx
Conducting zone
Nose-pharynx-larynx-trachea-bronchi-bronchioles-terminal bronchioles
Respiratory zone
Respiratory bronchioles-alveolar ducts-alveolar sacs-alveoli
During Quiet inspiration
Air enters the lungs until intrapulmonary pressure is equal to atmospheric pressure
Inspiration uses
External muscles
Experation uses
Internal muscles
During inspiration the pressure of the alveoli is less than
The atmospheric pressure
Pulmonary circulation
Low pressure system delivers blood low in oxygen from right side of heart to the lungs and returns blood rich in oxygen to left side of the heart
Exchange of gases takes place
In the lungs during external respiration and in the tissues during internal respiration