Lecture 21: Lung Macro & Micro Flashcards
lung lymphatics
white lines under visceral surface, channel lymph towards hilum and mediastinal lymph nodes
pleura composition and components
pleura is made of one layer of mesothelial cells, visceral (inner, intimate with lung) and parietal (outer)
pneumothorax
shrunken lung, associated with air in the pleural cavity
hemothorax
blood in the pleural cavity
sensory innervation of the lung and pleura
vagus nerve, vagus and sympathetic fibers for the visceral pleura, phrenic and intercostal for parietal pleura
vagus nerve in relation to lung position
vagus runs posterior to hilum of lung
phrenic nerve in relation to lung position
phrenic runs anterior to hilum
phrenic nerve diaphragm
provides motor (GSE) fibers to diaphragm
orientation of hilum components on right and left side
On left side artery, bronchi, vein (Are Brides Vain?)
On right side bronchi, artery, vein (You’re Right, Brides Are Vain!)
This is only true at point of exit from the lung, things can cross if the cross section is taken at a different point
Impressions on two lungs
Right lung impressions –> cardiac, azygos vein/arch, S. vena cava, I. vena cava, esophagus, brachiocephalic trunk
Left lung impressions –> cardiac, aortic arch, left subclavian, left brachiocephalic vein
The lungs have a dual blood supply
De-ox. from the pulmonary arteries, ox. from the bronchial arteries that come directly off of the aorta
bronchopulmonary segments
segments corresponding to bronchial tree, there are many of them
tracheobronchial tree components, switch from macro to micro
trachea –> intrapulmonary bronchus (primary/main, secondary/lobar, tertiary/segmental) –>bronchiole –> SHIFT TO MICRO STRUCTURES –> terminal bronchiole, respiratory bronchiole –> alveolar duct –> alveolar sac –> alveolus
components of trachea, outer to inner
adventitia, c-shaped rings, trachealis and longitudinal smooth muscles, submucosa, mucosa
adventita
outer covering of trachea, made of connective tissue
c-shaped rings
hyaline cartilage, incomplete dorsally
trachealis and longitudinal
smooth muscles
submucosa
mucous and serous glands