A10 Anatomy of Lungs and Plurae Flashcards
Mediastinum:
medial, contains heart, great vessels, other structures
plural cavities
right and left contains lungs and pleurae
pleura
serous membrane
invests lunchs
lines pleural cavity
encloses pleural sac
-real space, very small
Serous layers are sheets of mesothelium that are one cell thinck and secrete small amount of fluid
layers of pleurae
Visceral Pleura: adherent to lung material
parietal pleura: adherent to body wall -cervical -costal diaphragmatic -mediastinal
continuous at hilum of lunch and pulmonary ligament
sternal reflection
lines indicating changes in direction of pleura
R& L sternal angles meet at stenal angle
right descends to xiphoid process to become costal reflection
left deviates at tib 4: heart
costal reflection
costal pleural reflection costal and diaphragmatic plurae continuous
right and left costal reflections reach rib 8 at midclvicular line nad rib 10 at midaxillary line
right and left costal reflections terminate at rib 12 (t12) at paravertebral line
pleural recesses
space with no lung
costal diaphragmatic recess
- costal diaphragmatic pleurae meet
- includes some costal reflection
space that can fill with fluid, aspirated at midaxillary line ribs 9-10
costomediastinal recess
lateral to the inferior portion of the sternal body on the LEFT side
associated with the cardiac notch of left lung
costodiaphragmatic recess: gutters along the costal reflection
(2 rib rule)
MDA 1.41 and MDA 1.31
pleuritis (pleurisy)
inflammation of pleura (infection/adhesion) pain with activity (audible friction)
Breach of Pleural cavities
R&L separate
- Hydrothorax: fluid
- pneumothorax: air
- hemothorax: water
- chylothorax: lymph
breach of thoracic wall
lunch highly elastic recoils to 1/3 original size (pneumothorax)
Mediastinum
Central compartment of thoracic cavity
Contains Heart, great vessels, leaves impression of cadaveric lungs
separates right and left lungs and pleura
connected at hilum/root of lunch
Lung anatomy borders
Apex (base of neck)
Base (over diaphragm
costal surface
diaphragmatic surface
mediastinal surface
ANTERIOR BORDER
- this shart over pericardium
- cardiac notch on left lung
INFERIOR BORDER
- periphery of diaphragm
- sharp costodiaphragmatic recess
- blunt at mediastinum
Posterior Border:
Rounded, near vertebra
Right Lung
THree lobes
(superior, middle, inferior)
horizontal fissure
Oblique fissure
middle lobe wedge shaped
Left Lung
2 lobes (superior and inferior)
Oblique fissure
Cardiac notch in anterior border
lingual inferior to cardiac notch
