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Respiratory System (Gas Exchange in Difference Animals (Small Animals; …
Respiratory System
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Definition
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Cellular Respiration
Process oxidising food molecules to produce Carbon Dioxide,Water and Energy
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Gills of Aquatic Animals
Internal Gills
Features :check: Moist and Thin :check: Made up of gill filaments :check: To maximize rate of diffusion :pencil2: Increase surface area of gills with feather-like arrangement :pencil2: Constantly pump water across gills
:check: Limitation :pencil2: only efficient in water not on land :pencil2: Lack support needed in less-buoyant air
External Gills
:check: To maximize rate of diffusion :pencil2: Thin gills :pencil2: Increase surface area with feather-like arrangement of gills :pencil2: Skin as additional respiratory surface :check: Limitation :pencil2: Must in contant motion :pencil2: Tissue delicate and cannot be protected
Rate of Diffusion
Can be increased if;
:check: Increase area of respiratory surface
:check: Increase difference in concentration on either side of respiratory surface
:check: Decrease distance over which gases must travel
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