Lower Respiratory System Flashcards
What does the trachea divide into?
2 bronchi that branch into bronchioles which are smaller tubes
What are the lungs covered by?
A thin membrane called the pleura
What is the pleural space?
Contains pleural fluid, which reduces friction between the lungs and the rest of the thoracic cavity
How many lobes does the right lung have?
3
How many lobes does the left lung have?
2
Which lung has the cardiac notch?
Left lung
What does the bronchioles branch off to?
Tiny air sacs called alveoli
What surronds each alveolus?
Capillaries
What is a surfactant?
Prevents the alveoli from collapsing
What makes up the respiratory zone? And what is the site of gas exchange?
The alveoli and the surrounding capillaries
Where are respiratory membranes found?
Between the capillary and each alveolus
What do alveolar macrophages do?
Move in and out of the alveoli, collecting any remaining bacteria or particles
