Respiratory System Guided Notes
What:
The respiratory system provides __________________ to the body, disposes of
_________________________________________, and helps
regulate_____________________.
How:
______________________________ occurs in the air sacs of the lungs, called
_______________________, and at _____________________________ around the body.
Why:
Without ______________________________, cells will eventually die. Too much
___________________________ in the blood will cause the blood pH to become
_______________________, which will interfere with cellular function.
Functional Anatomy of The Respiratory System
The Nose
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Only _________________________________ part of the respiratory system
During breathing, air enters the nose by passing through the ________________, or
nares.
Interior consists of _________________________, divided by a midline nasal
__________________.
_____________________________ receptors located here
_____________________________________ warms the air as it flows past
______________________ greatly increase the ____________________ of the mucosa
exposed to the air
Nasal cavity separated from the oral cavity by the __________________ (hard and soft)
Nasal cavity surrounded by a ring of _______________________________ located in
the ________________, sphenoid, ethmoid, and _______________________ bones.
Sinuses lighten the skull and act as _______________________ for speech; also produce
mucus
The Pharynx
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_____________________ passageway about 13 cm long
Common passageway for _______________and _________________
Continuous with the nasal cavity __________________ via the posterior
__________________________________________
Three regions:
o _____________________
o _______________________
o ______________________
The Larynx
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Routes air and food into the proper channels
Plays a role in _____________________
Formed by eight rigid ___________________________________ and the
_____________________
____________________________ are found here
The Trachea
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______________________________
10-12 cm from larynx to fifth __________________________ vertebra
Fairly rigid, reinforced with __________________________________
Lined with_____________________________ surrounded by_____________________
cells
Main Bronchi
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Formed by the division of the _______________________________________
Right main _________________________ is wider, shorter, and straighter than the left
By the time incoming air reaches the bronchi, it is________________, cleansed of most
_____________________________, and__________________________
The Lungs
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Fairly large
Occupy entire __________________________________ except the central area
occupied by the _________________________ that houses the heart, the great blood
vessels, bronchi, the esophagus, and other organs
_____________________ – the narrow superior portion of each lung, just deep to the
clavicle
_____________________________________ - broad lung area resting on the
diaphragm
____________________________________ – left as two; right has three
____________________________________ – visceral serosa covering the surface of
each lung
____________________________________ – covers the walls of the thoracic cavity
Bronchial Tree
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____________________________ of the main _____________________________
Smallest subdivisions are the___________________________________