6.2 - Gas Exchange In Single Celled Organisms And Their Environment Flashcards
1
Q
What type of organism is the amoeba?
A
Unicellular organism
2
Q
How is an amoeba adapted for gas exchange? (4 things)
A
- high SA:V ratio
- use the cell membrane as a gas exchange surface
- thin, moist, permeable membrane for efficient diffusion
- short diffusion distance
3
Q
What type of organism are earthworms?
A
Multicellular organisms
4
Q
Where does the gas exchange occur on an earthworm?
A
Body surface
5
Q
Give two adaptions of earthworms for gas exchange.
A
- Large SA
- Live in damp conditions
6
Q
How do earthworms carry nutrients and gases around their body?
A
In a closed circulatory system with a blood pigment
7
Q
How are flatworms adapted for gas exchange? (1 way)
A
Large SA:V ratio
