Anatomy of the Lung Flashcards
What are the two different blood supplies of the lungs?
Pulmonary and bronchial circulation.
What does the pulmonary circuit do?
Supplies the respiratory tissues (parenchyma) with deoxygenated blood.
What does the bronchial circuit do?
Nourish the non-respiratory tissues with oxygenated blood.
How many lobes does the right lung have and what are they?
3; Superior, middle, and inferior lobes.
Which additional fissure does the right lung have that the left lung does not?
Horizontal fissure
What fissure do both the right and left lungs have?
Oblique fissure
How many lobes does the left lung have and what are they?
2; Superior and Inferior lobes.
What is the cardiac notch and what lung is it distinctive too?
It’s an indentation on the left lung, where the heart sits.
What is the lingula, and what lung can it found on?
An extension of the left superior lobe into the left costomediastinal recess.
What are the conducting airways of the respiratory system?
Trachea, primary bronchi, secondary bronchi, and tertiary bronchi.
Begins at the cricoid cartilage and descends in the thorax, where it bifurcates into right and left primary bronchi at the T4-T5 vertebral level.
Trachea
Consists of C-shaped rings of hyaline cartilage closed posteriorly by the trachealis muscles.
Tracheal wall
The internal ridge of the tracheal bifurcation into primary bronchi.
Carina
Divides into superior, middle, and inferior secondary bronchi.
Right primary bronchus
Which bronchus is shorter and wider the left or the right?
Right bronchus
Which bronchus is more horizontal the left or right?
Left bronchus
Which vein arches over the right primary bronchus prior to entering the superior vena cava?
Azygos vein
Divides into superior and inferior secondary bronchi.
Left primary bronchus
What artery arches over the left primary bronchus?
Pulmonary artery
Each secondary bronchus further divides into __________, which continue to divide.
Tertiary bronchi
The smallest bronchi give rise to _________, which terminate into __________ where the exchange of gases occur.
Bronchioles, and alveolar sacs.
The medial concave surface containing the hilum (root) of the lungs related to the pericardium and heart.
Mediastinal lung surface
The base of the lungs is curved because it rests on the domed diaphragm.
Diaphragmatic lung surface
This area projects into the root of the neck and is crossed anteriorly by the subclavian artery and vein.
Apex of the lung
