ANATOMY OF RESPIRATORY SYSTEM

-          The respiratory system is divided into 2 parts:

a)      Conducting part

b)      Respiratory part

-          Conducting part is also known as the air-way passage which most made up of anatomic dead. The term dead is used to refer that this conducting part is only to allow air to pass through and not to have gaseous changes along with in it.

-          Respiratory part is referred to the alveolus that contains air sac lined by moist alveolar wall for gaseous exchanges to occur.

-          The vital organ can be seen in this respiratory system is the two lungs.

Right lung	Left lung
3 lobes : a)      Upper lobe b)      Middle lobe c)       Lower lobe	2 lobes : a)      Upper lobe b)      Lower lobe
10 respiratory segments	8 respiratory segments
1 fissure : a)      Oblique fissure	2 fissures : a)      Horizontal fissure b)      Oblique fissure
3 borders: a)      Anterior border b)      Posterior border c)       Inferior border	Same as right lung
3 surfaces : a)      Costal surface b)      Inferior surface c)       Medial surface	Same as right lung
No cardiac notch	Cardiac notch
No lingual	Lingula present
Shorter and wider due the position of liver that slightly push up the diaphragm.	Longer

-          On medial surface, there are two subdivisons:

a)      Posteriorly vertebral part

b)      Anteriorly mediastinal part

c)       There is also a hilum place for posteriorly bronchus, pulmonary arteries and veins.

-          Cardiac notch is arc-shaped that suit the position of heart which left from the midline.