Principles - Respiratory System Flashcards
What route does air take in normal breathing?
- right/left nasal cavities or the oral cavity
- pharynx
- larynx
- trachea (becomes LRT)
- right and left main bronchus
- lobar bronchi
- segmental bronchi
- bronchioles
- alveoli
Where does the larynx become the trachea?
At the level of C6
What is the epiglottis?
a flap of cartilage behind the root of the tongue, which is depressed during swallowing to cover the opening of the windpipe.
What happens at the carina?
The bronchi separate
How many bronchopulmonary segments are there?
10
What does the respiratory tree describe?
The anatomy of the LRT airways from trachea to alveoli
What is a lung lobe?
The area of lung that each of the lobar bronchi supply with air
Each lung lobe has its own air supply (lobar bronchi), blood supply, nerve supply and lymphatic drainage
How many lobar bronchi are there?
5 - one for each lung lobe
What is a bronchopulmonary segment?
The area of lung lobe that each one of the segmental bronchi supply with air.
What are tissues?
Deep crevices that separate the lung lobes
What are the lobes in the right lung?
There are 3
Upper, middle and lower
What are the lobes in the left lung?
There are 2
Upper and lower
Where is the horizontal fissure?
separates right middle lobe from right upper
What supports the walls of the trachea and bronchi?
hyaline cartilage
This assists with maintaining the patency of the airways - holds them open
The amount of cartilage gradually reaches distally in the respiratory tree
What is the most prominent feature of the walls of the bronchioles?
Smooth muscle
It becomes progressively more prominent distally - bronchioles can therefore constrict or dilate