| What is the Kinetic theory of gases | Gases are a collection of molecules moving around a space
Pressure generated by collisions of molecules with the walls |
| What is the definition of Pressure | The force exerted on a unit area by a gas next to it
Pressure ( Pa ) = Force ( N ) / square meter ( m^2 ) |
| What is the conversion of Pascals into mmHg | 1 kPa = 7.5 mmHg |
| What is the blood supply of the intercostal muscles | Intercostal arteries --> Each intercostal space except the last 2 contain an anterior intercostal artery and a antamoses of the posterior intercostal artery
Intercostal veins --> 2 anterior and 1 posterior, anterior intercostal veins drain into the subclavian vein while the posterior vein drains into the superior vena cava |
| What is the difference between the bronchi and bronchioles | Bronchi contain cartilage unlike bronchioles
Bronchioles contain more smooth muscles and are generally smaller |
| What is the typical epithelium found in respiratory organs | Pseudostratified ciliated columnar epithelium |
| What are the borders of the respiratory system | Above is the neck and the thoracic inlet
Intercostal spaces and ribs laterally
Posterior is the thoracic vertebrae
Diaphragm is below |
| What are the 3 parts of the sternum | Manubrium → which articulates with the 1st and part of the 2nd costal cartilage
Body → Articulates with part of the 2nd and 3rd - 7th costal cartilage
Xiphisternum → remains cartilaginous into adult life |
| What is the function of the 2 intercostal muscles | External intercostal muscles → Inspiratory muscles, elevates the ribs and responsible for chest expansion
Internal intercostal muscles → Expiration muscles for expiration |
