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RESPIRATORY SYSTEM 1.External respiration 2.Internal respiration.

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Presentation on theme: "RESPIRATORY SYSTEM 1.External respiration 2.Internal respiration."— Presentation transcript:

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2 RESPIRATORY SYSTEM 1.External respiration 2.Internal respiration

3 RESPIRATION External Internal Between environment and lungs Between blood and cell

4 RESPIRATORY TRACT Bronchi Epiglottis

5 TRACHEA TUBULAR PASSAGEWAY FOR AIR Bronchioles

6 Respiration Video

7 The Mechanics of Breathing

8 DIAPHRAGM Dome-shaped muscle attached to rib cage that contracts& flattens out during breathing

9 Observe what happens to the diaphragm.

10 PRESSURE force of air pressing down Less air particles- Low air pressure More air particles- High air pressure

11 High to Low Pressure (Many to Less) How do you change the pressure?

12 Air pressure (outside air) Air pressure (empty space) Air pressure (inside balloon

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14 Breathing – The Lungs Breathing animation "nature hates a vacuum"

15 Breathing in - inhaling Rib cage – expands Diaphragm – moves downward Pressure – reduces inside lung Result – air is drawn into the lungs

16 Breathing out - exhaling Rib cage – contracts Diaphragm – moves upward / inward Pressure – increases inside lung Result – air is pushed out of the lung

17 BREATHING

18 Breathing – The Lungs Breathing animation Write a paragraph explanation/ summary on how breathing works. Discuss the role of the ribcage and the diaphragm and how these creates a pressure difference so breathing can take place. "nature hates a vacuum"

19 Gas Exchange

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21 Air Composition Inhaled air  Nitrogen N 2 – 79%  Oxygen O 2 – 20%  CO 2 – 0.04%  Others % Exhaled air  Nitrogen N 2 – 79%  Oxygen O 2 – 16%  CO 2 – 4%  Others - 1%

22 Breathing – The Alveoli Diffusion – The movement of gas from an area of high concentration to an area of low concentration.

23 DIFFUSION

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25 Alveoli CO 2 and O 2 exchanged at the same time venule (deoxygenated blood) arteriole (oxygenated blood)

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27 Breathing – The Alveoli O2O2 O2O2 O2O2 O2O2 O2O2 CO 2 Breathing in Breathing out high concentration of oxygen high concentration of carbon dioxide low concentration of oxygen low concentration of carbon dioxide Diffusion To the heart From the heart

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29 Respiration Food + Oxygen  CO 2 + water + ENERGY Glucose + O 2  CO 2 + water + ENERGY C 6 H 12 O 6 + O 2  CO 2 + H 2 O + ENERGY C 6 H 12 O 6 + 6O 2  6CO 2 + 6H 2 O + ENERGY

30 Cell Respiration C 6 H 12 O 6 + 6O 2  6CO 2 6CO 2 + 6H 2 O + Energy


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