Kingdoms and Gas Exchange

Created by: Daniel Armstrong
Created on: 19-03-13 11:25

Name the Kingdoms

Prokaryota, Protocista, Fungi, Plantae, Animalia

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How is the Kingdom broken down?

A number of phyla make up a kingdom. A number of classes make up a phylum. A number of orders make up a class. A number of families make up an order. A number of genera make up a family. A number of species make up a genus.

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List the three basic principles needed for efficient gas exhange to take place.

Moistness. Large Surface area to voulme ratio. Short diffusion pathway

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Unicellular organisms don't have specialised gas exchnage surfaces. How do they take in oxygen?

gases diffuse in through their cell membrane. unicellular organisms have a large surface area to volume ratio. They are therefore efficient when it comes to exchanging gases through their membrane.

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Multicellular organisms are larger than unicellular ones so how do they respire?

However, if they are small, or large but very thin (like the flatworms, Platyhelminths), the outer surface of the body is sufficient as an exchange surface because the surface area to volume ratio is still high.

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What about larger multicellular organisms?

Larger organisms need specialised exchange surfaces e.g. gills or lungs. Land-living organisms usually have internal gas exchange surfaces to prevent too much water being lost from the body.

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Other cards in this set

Card 2

Front

How is the Kingdom broken down?

Back

Card 3

Front

List the three basic principles needed for efficient gas exhange to take place.

Back

Card 4

Front

Unicellular organisms don't have specialised gas exchnage surfaces. How do they take in oxygen?

Back

Card 5

Front

Multicellular organisms are larger than unicellular ones so how do they respire?

Back

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Kingdoms and Gas Exchange