lungs Flashcards
(33 cards)
what is pluera
continuous serous sac which surrounds the lung
parietal pleura lines
thoracic cavity inside endothoracic fascia.
visceral pleura surrounds
lung and enters fissures
pluera cavity contains
5-10 ml. of serous fluid
costal pluera lines
ribs, costal cartilages, intercostal muscles and
back of the sternum
the phrenicopleural fascia connects
diaphragmatic pleura with
the muscular fibers of the diaphragm and moves with it during respiration
At the hilum of the lung, the mediastinal pleura reflects
laterally onto the root of the lung to
become continuous with the visceral pleura
to form a tubular sheath (pleural
cuff)
The 2- layers (mediastinal parietal pleura &
visceral pleura) are continuous with each other
this sheath surrounds root of lung in the hilum
what is pleuritis (pleurisy)
Inflammation of the parietal pleura
how is pleuritis (pleurisy) caused
viral infections, pneumonia, lung cancer, TB, autoimmune
conditions such as Lupus
clinical signs of Pleuritis (pleurisy)
shortness of breath and pleuritic chest pain
Pleurisy may cause
build-up of excess fluid around the lungs = pleural effusion
– leads to worse shortness of breath
Nerve Supply of Pleura : parietal pluera
-Costal = intercostal nerves
-Mediastinal = phrenic nerve
-Diaphragmatic
1) Medially by phrenic nerve.
2) Peripheral part by lower 6
intercostal nerves
Nerve Supply of Pleura : visceral pluera
-Sympathetic N.S. from pulmonary
plexus =Pulmonary branches of vagus and
sympathetic chain
Blood supply of Parietal Pleura
- intercostal, internal
thoracic & musculophrenic vessels
Blood supply of visceral Pleura
bronchial vessels
Lymphatic Drainage Parietal pleura
intercostal, mediastinal & diaphragmatic lymph nodes.
Lymphatic Drainage visceral pleura
broncho-pulmonary lymph nodes in hilum
Anterior border of lung is
sharp, thin and overlaps the heart
The hilums of both
lungs lie at the
level of
2nd,3rd, and 4th costal cartilages
T4-T6
blood supply of lung , bronchial arteries
(branches of descending thoracic aorta) supply oxygenated blood to
bronchi, lung tissue & visceral pleura (1% of total blood to the lung).
bronchial veins drain into
azygos & hemiazygos veins
Pulmonary artery carries
non-oxygenated blood from right ventricle to the lung alveoli
2 pulmonary veins carry
oxygenated blood from lung alveoli to the left atrium.
