A_RESP4C - Re spiratory S m yste Oxyge Availability Lim...

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Respiratory System
Oxygen Availability Limits thePerformanceof Organs
and Tissues -
I.E. Your Performance
.
S. C. Williams
San Francisco StateUniversity

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Introduction

What is it? System of air ducts and
gas exchange surfaces

Conducting passageways :
nose, pharynx, larynx, trachea,
bronchi, bronchioles

Absorptive surfaces :
respiratory bronchioles, alveoli

Alveolar-capillary
membranes
Crouch 1985

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Topics for Discussion

Organs of respiration

Functions of respiratory system

Organs of respiration

Alveolar-capillary membrane

Breathing movements

Respiratory air volumes

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Organs of
Respiratory System

Nose

Nasal aperture and passage ways

Nasopharynx

Laryngeal pharynx

Larynx

Trachea

Bronchi – primary, secondary and tertiary

Bronchioles

Alveolar sac and alveoli

Alveolar capillary membranes
Crouch 1985

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Functions

Oxygen absorption & carbon dioxide excretion

Vocalization

Olfactory reception & orientation

Processes air for quality

Supports spinal column

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Physical Requirements of
the Respiratory System

Exchange surfaces must be thin & differentially
permeable

Exchange surfaces must be moist (gases carried
through dissolved in water)

Surfactant – reduces surface tension

Extensive blood supply (capillaries) necessary

Effective means for continually moving fresh air

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Upper Respiratory
Structure & Function

Nose -- external nares, vestibule,
nasal cartilages, vestibular hairs

Nasal aperture -- nasal septum, hard