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Title: Gas Exchange in Fish Gills - AQA AS Level Biology
Description: As title describes, concise notes covering Gas Exchange in Fish Gills under chapter 6 of the kerboodle AS level (new( spec Biology.
Description: As title describes, concise notes covering Gas Exchange in Fish Gills under chapter 6 of the kerboodle AS level (new( spec Biology.
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Gas Exchange in Fish
The System
Firstly, water is taken in through the mouth of the fish and is passed over the gills
...
The Countercurrent Exchange Principle
The arrows above show the direction of flow of two substances, one is water (blue arrow on top)
and one is blood in the gill lamellae (purple arrow on bottom)
...
is
The nature of the opposing direction of flow at work here means that the water always has a
higher concentration of oxygen than the blood at any point in the flow
...
Due to the countercurrent nature of the water and blood flow, the water always has a higher
concentration of oxygen than the blood
across the entire gill filament
...
Large Concentration Gradient is achieved by the countercurrent flow of the water and the
blood, as at any one point, the water will have a higher concentration of oxygen than the blood it
is closest to
...
Title: Gas Exchange in Fish Gills - AQA AS Level Biology
Description: As title describes, concise notes covering Gas Exchange in Fish Gills under chapter 6 of the kerboodle AS level (new( spec Biology.
Description: As title describes, concise notes covering Gas Exchange in Fish Gills under chapter 6 of the kerboodle AS level (new( spec Biology.