10
28
The Respiratory System
Main Function
To supplyO2 to tissues
To remove CO2from tissues
This requires respiration this requires the 4 following processes
1 Pulmonary ventilation
2 External respiration
3 Transport of respiratory gases
4 Internal respiration
Components
Functional Divisions
Is
respiratory
conducting Zone equity
duct system
testator
cleanses humidifies
warmsincoming air
RespiratoryZone gasexchange
lungs blood
site of gasexchange
Bronchioles alveoli
1 The Conducting Zone the conchaeincreasethe
mucosalsurfacewhichprovides
The Nasal Cavity moremucusinteractionw the
turbulentair thistrapsmoredust
particles helpscleanair Also
increaseairturbulence
The Olfactory mucosa linesthesuperior
region ofthe nasal cavity where olfactory receptors
arelocated
d
,b Field
respiratory mucosa lines the rest of thenasal cavity Theepitheliumis
Pseudostratified columnar epithelium w scattered Goblet cells Thesecellsalong
w mucous nasal glands secrete 1 Qt mucus per day
Epithelia are ciliated These cause waves ofmucus toward thethroat forswallowing
Yngele when Cilia are toocold they don't move mucus nosedrips
ager water in warmexpired air condensesincoldclimate Increase
runnynose
BUengorge w blood to warm air RedNose
Paranasal Sinuses
Surround nasal cavity
Warms moistens air
Produce mucus that drains into nasal cavity
Blowing your nose helps to drain the sinuses
A Pharynx throat
Connects nasal cavity to larnyx esophagus
5 base from base of skull to CG
Divided into 3 regions
1 Nasopharynx just air
Posterior to Nasal cavity Only an airway
Closedoffduring swallowing by softpalate uvula movingupward
Lined w ciliated pseudostratified epithelium
High posterior wallhas pharyngealtonsils adenoids
, 2 Oropharynx air food
Posteriorto oral cavity
Runsfrom softpalate to epiglottis
Both air foodpassthroughso protectionfromfrictionisneeded
Epithelium is stratified squamous
a singlelayerofepithelium wouldnotbetoughenoughforfood
3 Laryngopharnyx air food
Posteriorto epiglottis
Extends tolarnyx
Continuous w esophagus
Both air foodpassthrough soprotectionfromfrictionisneeded
Epithelium is stratified squamous
B Larynx voicebox justREFOOD
Attaches to hyoid bone
Sits on top of trachea
Located behind laryngealprominence
Epithelium is ciliated pseudostratified
Functions
Provide open
airway
Ensures air food gointo theproperchannels epiglottis
Voice production
28
The Respiratory System
Main Function
To supplyO2 to tissues
To remove CO2from tissues
This requires respiration this requires the 4 following processes
1 Pulmonary ventilation
2 External respiration
3 Transport of respiratory gases
4 Internal respiration
Components
Functional Divisions
Is
respiratory
conducting Zone equity
duct system
testator
cleanses humidifies
warmsincoming air
RespiratoryZone gasexchange
lungs blood
site of gasexchange
Bronchioles alveoli
1 The Conducting Zone the conchaeincreasethe
mucosalsurfacewhichprovides
The Nasal Cavity moremucusinteractionw the
turbulentair thistrapsmoredust
particles helpscleanair Also
increaseairturbulence
The Olfactory mucosa linesthesuperior
region ofthe nasal cavity where olfactory receptors
arelocated
d
,b Field
respiratory mucosa lines the rest of thenasal cavity Theepitheliumis
Pseudostratified columnar epithelium w scattered Goblet cells Thesecellsalong
w mucous nasal glands secrete 1 Qt mucus per day
Epithelia are ciliated These cause waves ofmucus toward thethroat forswallowing
Yngele when Cilia are toocold they don't move mucus nosedrips
ager water in warmexpired air condensesincoldclimate Increase
runnynose
BUengorge w blood to warm air RedNose
Paranasal Sinuses
Surround nasal cavity
Warms moistens air
Produce mucus that drains into nasal cavity
Blowing your nose helps to drain the sinuses
A Pharynx throat
Connects nasal cavity to larnyx esophagus
5 base from base of skull to CG
Divided into 3 regions
1 Nasopharynx just air
Posterior to Nasal cavity Only an airway
Closedoffduring swallowing by softpalate uvula movingupward
Lined w ciliated pseudostratified epithelium
High posterior wallhas pharyngealtonsils adenoids
, 2 Oropharynx air food
Posteriorto oral cavity
Runsfrom softpalate to epiglottis
Both air foodpassthroughso protectionfromfrictionisneeded
Epithelium is stratified squamous
a singlelayerofepithelium wouldnotbetoughenoughforfood
3 Laryngopharnyx air food
Posteriorto epiglottis
Extends tolarnyx
Continuous w esophagus
Both air foodpassthrough soprotectionfromfrictionisneeded
Epithelium is stratified squamous
B Larynx voicebox justREFOOD
Attaches to hyoid bone
Sits on top of trachea
Located behind laryngealprominence
Epithelium is ciliated pseudostratified
Functions
Provide open
airway
Ensures air food gointo theproperchannels epiglottis
Voice production
