Week 2 Flashcards
What is the pleural cavity
an enclosed potential space between parietal and visceral layers of pleural
membranes, kept moist by a small volume of pleural fluid
what pressure is the pleurae normally kept at
sub-atmospheric
pressure.
what innovates the parietal pleura
The intercostal and phrenic nerves (both somatic)
what innovates the visera pleura
visceral afferents from the underlying lung.
transverse (horizontal) fissure
separates the middle from
the upper lobe of the right lung
what is the mediastinum
central mass of tissue between the two pleural cavities and covered on each side by
the mediastinal pleura.
location of the mediastinum
extends from the superior thoracic aperture to the diaphragm, and from the
sternum and costal cartilages anteriorly to the thoracic vertebra posteriorly
how is the mediastriumum divided
divided into superior and inferior parts by the transverse plane between the sternal angle
anteriorly and the intervertebral disc of the T4/T5 level. The inferior mediastinum is further divided into
three parts by the presence of the pericardium and its contents (heart and great vessels).
where does the anteriour medistanium lie
between the pericardium posteriorly and the sternum and costal cartilages anteriorly
where does the posterior medistanium lie
osterior to the pericardium and is bounded posteriorly by the thoracic vertebra
T5 - T12.
what is the middle mediasternum made off
osterior to the pericardium and is bounded posteriorly by the thoracic vertebra
T5 - T12.
thoracic duct
lies posterior to the oesophagus and between the descending thoracic
aorta and the azygos vein
The lymph nodes are related to
the bifurcation of the trachea (called the subcarinal or
tracheobronchial lymph node
The lymph nodes are related to
the bifurcation of the trachea (called the subcarinal or
tracheobronchial lymph node
where does the phrenic nerve pass relative to the hilum of the lung
anterior
