Exchange Surfaces Flashcards
1
Q
Fibrous
A
Lose of elasticity
Scarring walls of lungs
Less efficient gas exchange
2
Q
Gas exchange in unicellular organisms
A
Oxygen is higher concentration in environment diffusion
CO2 diffuses out
3
Q
An example of unicellular organism
A
Amoeba proteus- single celled organism which uses the same system for gas exchange
4
Q
Gas exchange insects
A
Air enters the body through the insect through spiracles
Spiracles transfers the air to thin tubes called tracheal
Tracheal system contains a special fluid for carrying dissolved oxygen
5
Q
Exchange surfaces in plants
A
Stomata open and closes regulated by guard cells
They close when the plant has lost too much water
Open when gas exchange needs to be maximised
