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Lecture 19 Respiratory System Intro
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Primary Functions of Respiratory System (4)
1) Exchange gases between blood and atmosphere
2) Regulation of pH ---> CO2 exchange
3) Protection from inhaled pathogens
4) Vocalization
Pathway of airflow
Upper-
*Nasal / Oral cavity
* Larynx/ vocal cords
Lower
*Trachea
*R and L Bronchus
*22 different Bronchii
*Bronchioles, REspiratory beonchioles
*Alveoli
*Bones/ Muscles/ Thorax
*Diaphragm
*Pleural Sac
Pneumothorax
Thoracic Cage Punctured
*Pleural space ecquilibraates with Atmospheric Pressure.
*Negaative Pressure cant be attained.
* Lungs Collapse
Type 1 Alveolar
MAJORITY
*Very thin
* Reduce diffusion distance
Type 2 Alveolar
FEWER
*Thicker
* Secrete surfactant, to prevent alveolar sac from collapsing.
Surfactant
*Soap like lipo protein produced by typ 2 alveolar cells.
*Make easier for alveoli to expand
How is surfactant production affected?
NRDS- Occurs in premature babies, surfactant defficiency leads to lungs collapsing.
*Chemical damage reduces production
* Pneumonia countereffects surfactant.
Author
leti563
ID
301431
Card Set
Lecture 19 Respiratory System Intro
Description
Lecture 19 Respiratory System Intro
Updated
2015-04-24T07:45:15Z
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