Gas exchange
- Created by: oliviaeve
- Created on: 24-02-16 17:50
View mindmap
- GAS EXCHANGE
- mammals
- lungs
- respiratory surface = alveoli
- Anti sticking sufricant = moist
- thin (1cm thick)
- permeable
- circulatory system = constant concentration gradient
- large surface area from folds of tissue
- respiratory surface = alveoli
- lungs
- Fish
- Gills
- counter current flow system
- Ensures constant concentration gradient
- 80% of oxygen extracted
- highest rate of diffusion
- large surface area
- moist
- specialised blood pumping mechanism
- counter current flow system
- Gills
- Insects
- Tracheal system
- Ameoba
- thin cell wall = respiratory surface
- oxygen requirements are low
- unicellular
- lives in water
- LARGE SURFACE AREA TO VOLUME RATIO
- allows fast removal of carbon dioxide
- prevents cytoplasm from becoming too acidic which denatures enzymes
- Flatworm
- multicellular
- not short enough diffusion pathway
- flat to counteract lower surface area to volume ratio
- shortens diffusion pathway
- multicellular
- Earthworm
- multicellular
- lives in soil = terrestrial
- rudimentary circulatory system
- plants
- mammals
Comments
No comments have yet been made