Respiratory System /biology/the-human- body/respiratory-system
The respiratory system
Transcript of The respiratory system
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The Respiratory System
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Purpose of the respiratory system
• To provide a constant supply of oxygen to keep your body cells functioning
• To remove carbon dioxide from the body cells
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Organs of the respiratory system
• Nose / mouth• Nasal cavity• Pharynx • Epiglottis • Larynx • Trachea
• Trachea• Bronchus (bronchi)• Bronchioles• Alveoli • Pleura • Diaphragm
Lungs
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Figure 10.1
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Components of the Upper Respiratory Tract
Figure 10.2
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Passageway for respiration Receptors for smell Filters incoming air to filter larger foreign
material Moistens and warms incoming air Resonating chambers for voice
Upper Respiratory Tract Functions
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Components of the Lower Respiratory Tract
Figure 10.3
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Functions: Larynx: maintains an open airway, routes food
and air appropriately, assists in sound production Trachea: transports air to and from lungs Bronchi: branch into lungs Lungs: transport air to alveoli for gas exchange
Lower Respiratory Tract
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Gas Exchange Between the Blood and Alveoli
Figure 10.8A
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Respiratory Cycle
Figure 10.9
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Measurement of Lung Capacity
Figure 10.10A
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Reduced air flow: asthma, emphysema, bronchitis
Infections: pneumonia, tuberculosis, botulism
Lung cancer Congestive heart failure Cystic fibrosis
Disorders of Respiratory System
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Relationship to digestive system
• Cellular respiration requires glucose and oxygen to release energy to the body
• C6H12O6 + 6O2 6CO2 + 6 H2O + Energy • Oxygen is provided by the respiratory
system• Glucose is provided by the digestive
system• (glucose is made during photosynthesis)