The diffusion of gases down a concentration gradient across a respiratory surface, between an organism and its enviroment
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Respiratory Surface
The site of gas exchange
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Metabolic Rate
The rate of energy expenditure by the body
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Terrestrial Organisms
An organism that lives on land
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Parallel flow
Blood and water flow in the same direction at the gill lamellae, maintaining the concentration gadient for oxygen to diffuse into the blood only up to the point where its concentration in the blood and water is equal
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Operculum
The covering over the gills of a bony fish
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Counter-current flow
Blood and water flow in opposite directions at the gill lamellae, maintaining a concentration gradient and, therefore, oxygen diffusion into the blood along their entire length
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Cuticle
Waxy covering on a leaf secreted by epidermal cells, which reduces water loss
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Stoma (plural: stomata) or stomata pore
Pore on lower leaf surface, bound by two guard cells, through which gases and water vapour diffuse
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Other cards in this set
Card 2
Front
The site of gas exchange
Back
Respiratory Surface
Card 3
Front
The rate of energy expenditure by the body
Back
Card 4
Front
An organism that lives on land
Back
Card 5
Front
Blood and water flow in the same direction at the gill lamellae, maintaining the concentration gadient for oxygen to diffuse into the blood only up to the point where its concentration in the blood and water is equal
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