Lungs and Mechanism of Breathing Flashcards
How many membranes are there covering the lungs?
2
First membrane?
visceral pleura
second membrane?
parietal pleura
Which membrane is the outermost?
parietal
pleura is a thin serous membrane called …resting on a …. that forms a sack around each lung.
mesothelium, basal lamina
visceral pleura covers …
each lung
parietal pleura lines…
the wall of the pleura cavities that surround the lung
pleural cavity holds…ml of serous fluid
20
pleural fluid pressure is…
slightly lower than atmospheric pressure.
if the pleural cavity is compromised, then the lung will …toward the …region.
collapse, hilar
visceral pleura is continuous with the parietal pleura at the …of the lung.
hilum (hilar region)
hilum
root of the lung; where the bronchus and pulmonary vessels enter and leave the lung
pulmonary ligament is…
not a true ligament
What is the pulmonary ligament?
an extra reflection of pleural membranes onto each other; it is inferior to the hilar regions.
parietal pleura is subdivided into 4 areas…
cervical, costal, diaphragmatic and mediastinal pleuras
cervical pleura (cupula)
extends superior to 1st rib
costal pleura
contact with rib cage
diaphragmatic pleura
contact with upper surface of diaphragm
mediastinal pleura
contact with mediastinal structures
costomediastinal recess
where costal and mediastinal pleura meet anterior to the heart in the left pleural space.
what is adjacent to the costomediastinal recess?
lingula
costodiaphragmatic recess (aka costophrenic sulcus)
region that will most likely collect excess fluid in pleural space when upright.
fluid in pleural cavity is about …mmHg less than atm pressure which keeps lungs filling the pleural cavity.
2-6
because there is normally a lower pressure in the pleural space, both fluids and air will…and …lung from space.
fill this space; displace aka collapse the lung
