Bronchi, Lungs, Pleura Flashcards Preview

Thorax Anatomy > Bronchi, Lungs, Pleura > Flashcards

Flashcards in Bronchi, Lungs, Pleura Deck (14)
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1
Q

How do the left and right lobes divide?

A

The left bronchus divides into lobar bronchi within the lung. The right bronchus may divide into lobar bronchi in the hilum (before entering the lung).

2
Q

What is the lung pleura?

A

thin layer of flattened cells supported by connective tissue lining each pleural cavity and covering exterior of lungs

  • Visceral Pleura - covers surface lungs and lines fissures between the lobes
  • Parietal Pleura - lines inner surface of chest walls
3
Q

What is the pleural cavity?

A

usually collapsed, and moist surfaces allow lungs to glide as expand and collapse

4
Q

What is the Pleural origin:

A

pleural cavities inside chest wall lined by parietal pleura as lung buds and grows into them

5
Q

Structures passing through lung:

A

IVC at T8 (and right phrenic nerve), Oesophagus at T10 (and CNX) and Aorta at T12 (and thoracic duct/azygous vein)

6
Q

What is the innervation of the lung?

A
  • Anterior and posterior pulmonary plexus
  • Lie anterior and posterior to tracheal bifurcation and main bronchi
  • Branches of plexuses originate from sympathetic trunk (dilate) and vagus (constrict)
7
Q

What is the lymphatic drainage of the lung?

A

Trachebronchial nodes around roots of lobar and main bronchi

Extend from within lung, through hilum at root and into posterior mediastinum

8
Q

Where do phrenic nerves arise?

A

Anterior rami of C3,4,5

9
Q

What are the surface landmarks for the lung fissures?

A

Oblique fissure:
Begins posteriorly at T4–>passes inferiorly crossing R4–>ICS4–>R5 at MAL–>continues anteriorly along R4

Horizontal fissure:
Crosses R5 in MAL–>continues anteriorly–>cross ICS4–>follow R4 to sternum

10
Q

What are the surface landmarks of right parietal pleura?

A
  • Apex of lung 2cm superior to medial third of clavicle
  • Over sternoclavicular joint
  • Right of sternal angle
  • Right of 4th costal cartilage
  • Right of xiphoid (taken as 6th costal cartilage)
  • Mid clavicular line R8 (above costal margin)
  • MAL R10 rib costal margin
  • Posterior lower border is scapular line crossing R12
11
Q

What are the surface landmarks of left parietal pleura?

A
  • Similair to left BUT
  • CC4 and Xiphoid point deflect to left because cardiac notch (4-5cm)
  • deflects the anterior margin of left pleura lateral to sternum between 4-7th costal cartilage
12
Q

What are the surface landmarks of the right lung?

A
  • Follows pleural border until 6CC
  • Lower border:
    ○ MCL at R6 anteriorly
    ○ MAL at R8 laterally
    ○ Scapular line at R10 posterioly
13
Q

What are the surface landmarks for the left lung?

A
  • Same as right BUT
  • Mediastinal relfection below CC4
  • Below CC4 cardiac noth deviates by 2-3cm lateral at 5CC
  • Lower border same as right
14
Q

What happens to the costodiaphragmatic recess during expriration?

A

During expiration contains no lung because margin of diaphragm pressed closely against lower part of rib cage