the lungs & the pleura Flashcards
what does the left pleural cavity contain?
the left lung
what does the right pleural cavity contain?
the right lung
what does the mediastinum contain?
the trachea, the heart, the oesophagus, blood vessels & nerves
in which weeks does the respiratory system begin to develop?
4-6 weeks
what layer does the respiratory system develop from?
the endoderm layer
what forms from endodermal out pouches?
lung buds & bronchial buds
what are the 2 layers of pleura surrounding the lungs?
the visceral pleura & the parietal pleura
where does the visceral pleura attach?
connects to the parietal pleura & the hilum/root of the lung
where is the parietal pleura found?
it lines the internal aspect of the thoracic wall
what are the 4 parts that the parietal pleura is divided into?
- costal
- mediastinal
- diaphragmatic
- cervical
what is the pleural cavity?
the space between the 2 layers of pleura
what does the pleural cavity contain?
serous fluid
what holds the lungs against the thoracic wall?
the surface tension of the serous fluid
what are the 4 parietal pleural innervations?
- cervical: 1st intercostal nerve
- costal: intercostal nerves
- mediastinal: phrenic nerve
- diaphragmatic: lower intercostals & phrenic nerves
what is the visceral pleural innervation?
autonomic (sympathetic & parasympathetic) form pulmonary plexuses
how many lobes does the left & right lung have?
left: 2 lobes
right: 3 lobes