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PSE4U Mr. MacMillan. The Conductive Zone Nose, pharynx, trachea, bronchi, bronchioles The Respiratory Zone Respiratory bronchioles, alveolar ducts, alveoli.

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Presentation on theme: "PSE4U Mr. MacMillan. The Conductive Zone Nose, pharynx, trachea, bronchi, bronchioles The Respiratory Zone Respiratory bronchioles, alveolar ducts, alveoli."— Presentation transcript:

1 PSE4U Mr. MacMillan

2 The Conductive Zone Nose, pharynx, trachea, bronchi, bronchioles The Respiratory Zone Respiratory bronchioles, alveolar ducts, alveoli sacs. What Makes Up the Respiratory System ?

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4 1.Supply Oxygen to the blood 2.Remove CO 2 from the blood 3.Regulate blood pH Main Functions

5 Is the exchange of gases at the tissue level where Oxygen is delivered and Carbon Dioxide is removed Internal Respiration

6 The processes that occur within the lung involving the exchange of Oxygen and Carbon Dioxide External Respiration

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8 Diaphragm Contracts and moves downward towards the abdominal cavity when stimulated by the brain Ventilation The combination of inspiration (breathing in) and expiration (breathing out) Tidal Volume Volume of air in each breath Respiratory Frequency The number of breaths taken per minute Mechanisms of Breathing

9 Respiratory Control Centre Found within brain stem Medulla oblongata and pons Controlling Ventilation

10 Static Lung Volume Determined by actual structure of lung Dynamic Lung Volume Dependent, not only on volume, but on the movement or flow of air Three important Static Lung volumes Total lung capacity, vital capacity, residual volume TLC = VC + RV Lung Volumes

11 Diffusion The movement of gas, liquid or solid from a region of high concentration to low concentration. Gas Exchange

12 2% of Oxygen found within plasma of blood Hemoglobin Specialized protein found in erythrocytes that binds to Oxygen Oxygen Transport

13 Small amount is dissolved in the plasma (5 – 10%) 90 – 95% of CO 2 diffuses into erythrocytes, passed to alveoli and is exhaled Carbon Dioxide Transport

14 Blood pH is a measure of how acidic and basic blood is Blood pH is close to 7.4 – neutral is 7 More acidic during exercise – lactic acid (decreased pH) Ventilation increase pH back to normal Ventilation and pH


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