Lungs & Pleura Flashcards
1
Q
Pleura?
A
thin membrane of fibrous tissue surfaced by single layer of squamous cells
2
Q
Two layers of pleura?
A
- parietal (outer): layer lining thoracic wall (rib cage, vertebrae and diaphragm)
- visceral (inner): layer completely covering lung
3
Q
subdivisions of parietal pleura?
A
- costal pleura
- mediastinal pleura
- cervical pleura
- diaphragmatic pleura
4
Q
costomediastinal recess?
A
- Potential space behind the sternum & costal cartilages, where anterior margin of the lung fails to reach the anterior margin of pleura
- Assists lung expansion during deep inspiration
5
Q
costodiaphragmatic recess?
A
- In quiet respiration, inferior margin of the lung does not reach pleural reflection from the thoracic wall to the diaphragm
- Lower limit of lung is about 5cm above the lower limit of pleura
- From 8th to 10th rib along mid-axillary line
6
Q
arterial supply to the parietal pleura?
A
- intercostal artery
- internal thoracic artery
- musculophrenic artery
7
Q
venous drainage of parietal pleura?
A
- azygous veins
8
Q
nerve supply to parietal pleura?
A
- intercostal nerve to costal pleura
- phrenic nerve and intercostal nerves to diaphragmatic pleura
- phrenic nerve to mediastinal pleura
9
Q
parietal pleura develops from which layer?
A
somatopleural layer
10
Q
visceral pleura develops from which layer?
A
splanchopleural layer
11
Q
injuries to the root of the neck of the lung may cause?
A
a pneumothorax
note: children have shorter necks so they r more vulnerable
12
Q
relations of mediastinal surface- left lung?
A
- cardiac impression (deep)
- arch of aorta impression
- thoracic aorta impression
13
Q
relations of mediastinal surface for right lung?
A
- cardiac impression (shallow)
- oesophagus impression
- SVC impression
- arch of azygous vein impression
14
Q
arterial supply and venous drainage of visceral pleura?
A
bronchial vessels
