Respiration Flashcards
What body cavities are present in the Thoracic region?
Thoracic cavity and part of the abdominal cavity
Thoracic inlet consists of?
1st thoracic vertebra, 1st pair of ribs, and 1st sternebra (manubrium)
Thoracic outlet consists of?
Last thoracic vertebra, last pair of ribs, costal arch, last sternebra (xiphoid process)
Diaphragm attaches to?
Thoracic outlet
Diaphragm at rest … that reaches level with the … on the inside of the … cavity.
forms a dome shape, 6th rib, thoracic cavity
Diaphragm m. is important in separating … from …
thoracic cavity, abdominal cavity
Describe pleura
Serous membrane- secretes serous fluid to lubricate
Simple squamous epithelial
Covers organs and walls of cavities
Properties of pleura cavity
2 in the thoracic cavity
Closed potential space
Contains only a few drops of serous fluid
Negative pressure
Serves to help organs glide past each other and provide negative pressure to keep the lungs expanded against the wall of the thoracic cavity
Mediastinum
space and mediastinal pleura that encloses said space between the left and right pleural cavities.
Pleura lining the lungs
Visceral or pulminary pleura
Pleura lining the walls of the thoracic cavity
Parietal pleura
Pleura lining the rib cage
Costal pleura
Pleura lining the mediastinum
Mediastinal pleura
Pleura lining the diaphragm
Diaphragmatic pleura
Pleura connecting the pulminary and mediatinal pleura
Connecting pleura
Inspiration is a … Process and … The volume of the thoracic cavity
Active, increases
Principle mm. Of inspiration
Diaphragm- flattens
sclenus and serratus dorsalis cranialis- pull ribs dorsal, cranially, and outward
Ext. & int. intercostal mm.- make the rest of the ribs follow suite
Explain the process of inspiration
Mm. Act to increase volume of the thoracic cavity
Pleural cavity with its suction like negative preasure increases volume of lungs
Air pressure in lungs becomes less than that of atmosphere
Lungs fill with air
Expiration is usually a … Process, but can be …, that allows the volume of the thoracic cavity to …
Passive, active, decrease
Principle mm. is expiration are
Serratus dorsalis caudalis
Int & ext abdominal oblique mm.
Int & ext intercostal mm.
Transverse abdominal
Explain the process of passive expiration
Relax mm. related to inspiration
Elasticity of lungs decrease volume of lungs along with the volume of the thoracic cavity
Air pressure in lungs becomes higher than the atmospheric air pressure
Air leaves the lungs
What extra step is involved with active expiration?
the principle mm. of expiration contract in an abdominal press to forcefully decrease the volume of the thoracic cavity
Pathology where air is present in the pleural cavities of the thorax?
Pneumothorax
results in loss of negative pressure and ability of the volume of the lungs to be expanded