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Gas Exchange in Fish and Insects

Age 16-18 (A-level)

Animated, interactive powerpoint which guides students through the countercurrent system of fish gills and the tracheal system of insects (28 slides). It is hyperlinked so that you can choose which bits to show. The accompanying document comprises three worksheets and answer sheets. They use a variety of cloze / colouring / short answer questions .



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Published 04 Jan 2009

Contributed by Toby Tufton — Experienced contributor

4 people are following this contributor Average rating: 1 2 3 4 5

Others' feedback

Overall 1 2 3 4 5

Originality 1 2 3 4 5

Presentation 1 2 3 4 5

Content depth 1 2 3 4 5

Time saved 1 2 3 4 5

10 reviews

Anonymous

I used the diagrams but not all of the questions from the worksheet

Useful? Yes / No 1 2 3 4 5

v jones - Member

Useful? Yes / No 1 2 3 4 5

Anonymous

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Anonymous

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Louise Edgeworth - Experienced contributor

Excellent presentation with clear diagrams. High quality worksheet to go with it. Great!

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Abigail Laing - Admin

This is expertly presented - clear diagrams and succinct explanation. The worksheets are completely 'classroom ready' with answer sheets for easy marking.

Useful? Yes / No 1 2 3 4 5

Anonymous

This topic is new to the AS Bio spec and there are very few resources available. The ppt was very clear with good diagrams and the work sheet covered most of the areas needed for the spec - thanks

Useful? Yes / No 1 2 3 4 5

Anonymous

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Anonymous

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c wg - Contributor

Easy to navigate and use with worksheets

Useful? Yes / No 1 2 3 4 5

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Extracts from this resource

Gas Exchange (Fish and Insects)

1Gas ExchangeClick image to continueQuitTeachable.net 2009. Some rights reserved.
http://teachable.net/res.asp?r=2093 2Water enters the mouth.
It leaves through an opening behind the operculum. Next3Oxygenated water passes over gills.
Deoxygenated water leaves through the operculum opening. LabelNext4Gill filaments have rows of thin vertical lamellae
... with many capillaries
... covered by a single layer of cells.
This ensures a short diffusion distance.
GillsLabelNext5Water flows over (and under) the gill filaments.
Oxygen is removed by blood in the capillaries.
Capillaries carry blood in the opposite direction.
This is a counter-current system.
Gas exchangeNext6A counter-current system maximises oxygen uptake.
It ensures a good diffusion gradient
along the whole length of the capillary
Counter-currentHome7Gas ExchangeClick image to continueQuit8Ex?
Click tabs Home9ExExoskeleton
Insects have a tough wax-covered waterproof exoskeleton. This stops them drying out but stops gas exchange too.Home10ExSpiracle
Holes in the exoskeleton which can be opened or closed.Home11ExTrachea
A tube strengthened with rigid rings.
Air enters trachea and can pass to the tracheoles.Home12ExAir Sac
Larger insects need oxygen rapidly and pump air from

Gas Exchange Worksheets

Gas Exchange in Fish Name: /20

Name the chemical in fish blood which binds with oxygen? [1]
By what process does oxygen get from the water to the blood? [1]
List three features of the lamellae which make this process efficient?
i.
ii.
iii. [3]
Draw an arrow to show the direction blood flows in the gill lamella of an active bony fish.
[1]
What is this arrangement called? [1]
6. The graph shows the saturation with oxygen at different positions across the gill lamella.
i. Label positions A and B.
ii. Label one line blood and the other water [2]


How did you know which line would be the top line?
[1]
Does the concentration of oxygen in the blood reach the concentration in the water? [1]
Fish have a one way flow of water over the gill filaments. Explain whether this is more or less efficient than the two way movement of air in and out of the lungs in mammals?



[2]
Some fish have a parallel flow of blood and

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