Flashcards in Pleura (dave's notes) Deck (9):
Describe the pleura
A membrane of fibrous tissue surfaced by a single layer of very flat cells (mesothelium) to make it slippery
Describe the parietal layer of pleura
Lines the thoracic cavity attached by loose areolar tissue. Also covers the diaphragm, pericardium (strong attachment here), mediastinum and suprapleural membrane.
From what is the visceral pleura formed?
From the lung root a cuff is invaginated to form the visceral pleura
What does the visceral layer of pleura cover?
It coats the lungs and extends into the interlobar clefts
What is the function of the pleura
To provide two low friction surfaces.
What allows extra dead space
The pulmonary ligaments hang down (????)
What is the nerve supply to the pleura?
The parietal pleura is supplied segmentally by the intercostal nerves over costal elements. Over the diaphragm it is supplied by the phrenic nerves over the domes, and the intercostal nerves at the peripheries of the diaphragm.
The visceral pleura has only autonomic supply
What are the surface markings of the parietal pleura?
Laterally - the horizon of the thoracic cage, projecting above the medial 1/3rd of the clavicle by about 3cm.