2:3 Respiratory Physiology Flashcards
Respiratory physiology is the…
movement of air through the system.
Plural lining is lining that is…
a smooth contact for rough tissue
Plural lining is a contributor for…
thoracic expansions/enlargement into inspiration
Plural lining decreases..
surface tension in the lungs
2 types of pleurae within our lungs:
- Visceral Pleurae
2. Parietal Pleurae
Visceral Pleurae:
Pleurae that surrounds the lungs.
Parietal Pleurae:
Pleurae that surrounds the thorax (further from our lung).
Other subtypes of parietal pleurae in the thoracic cavity (3):
- Costal Pleurae (lines inner surface of the rib cage)
- Diaphragmatic pleurae (lines diaphragm)
- Mediastinal pleurae (lines mediastinum)
Pleurae’s Interaction:
Mucous solution is released between the parietal and visceral pleurae
Mucous solution (3 things it does):
- Reduces surface tension
- Provides a slippery interface between the lungs and thoracic wall
- Presence of surfactant keeps the sheets from clinging to each other
(Think of two pieces of plastic food wrap)
The plural lining of the diaphragm maintains contact with….
Allows for….
the visceral pleurae of the lungs.
-Allows for expansion during breathing.
Mediastinal Pleurae:
-what does it line and where is that space located and what doe it contain?
-allows for?
-Pleurae lining the mediastinum
(middle space of the thorax which contains the heart, nerves, blood vessels, thymus gland, esophagus, and lymph vessels).
-Allows for the beating of the heart
Pericardium:
-what is it and what does it enclose?
-phrenic nerves?
- Membranous sac enclosing the heart
- Left and right phrenic nerves pass along the lateral surfaces of the pericardium in order to innervate the diaphragm
Pneumothorax:
- Air gets into the pleural space between the lungs and chest wall resulting in loss of negative intrapleural pressure.
- Always results in a “collapsed” lung.
“Open” pneumothorax is…
air that is introduced into the space through a breach in the thoracic wall (e.g., knife wound, auto accident)
