Chapter 3: Lower Respiratory Tract Flashcards
What are the structures of the Lower Respiratory Tract?
Lungs, Bronchi, Bronchioles, Alveoli and Diaphragm.
What is the reason that the two lungs expand and contract?
To supply oxygen to tissues all over the body and dispose of carbon dioxide.
Each lung is enclosed by a double-layered serous membrane called?
The pleura.
Pleura membrane divides each lung into sections called?
Lobes.
How many lobes does the right lung have?
Three lobes.
How many lobes does the left lung have?
Two lobes to make room for the heart.
What are the Bronchi and Bronchioles?
A network of intricate passages that supply the lungs with air.
What does the primary Bronchi do before branching off into smaller bronchi?
Run into each lung before branching off into smaller bronchi.
Smaller bronchi subdivide into increasingly smaller branches called?
Bronchioles.
Each bronchiole further splits into many smaller branches called?
Terminal Bronchioles.
T\Where does the millions of tiny terminal bronchioles conduct air to?
To the alveoli of the lungs.
What are the Alveoli (air sacs)?
Very small grape like clusters.
Where are the Alveoli found?
At the end of each bronchiole.
Where does the exchange of the oxygen and carbon dioxide between the air in the lungs and the blood in the capillaries occurs?
Across the walls of the millions of alveoli in each lung.
What is the Diaphragm?
A muscular sheet between the base of the lungs and the abdominal cavity.
