Outcome 4 - Fish Flashcards
1
Q
Why do gills need to have a high surface area?
A
To obtain as much O2 as possible.
2
Q
Why does there need to be a rich supply of blood to the gills?
A
So O2 can reach the rest of the body quickly.
3
Q
Why can’t we breathe underwater?
A
Our lungs don’t have a high enough surface area to extract the oxygen from the water.
4
Q
What are gills characterised by?
A
They are very thin and have a high surface area with a rich supply of blood.
5
Q
Which gas is more soluble in water?
A
CO2 (Carbon Dioxide) is more soluble in water than oxygen.
6
Q
Do gases dissolve in water?
A
Yes, both oxygen and carbon dioxide are dissolved in water.
7
Q
Which type of water holds more dissolved gases?
A
Cold water holds more dissolved gases than warm water.
