Distinguish between aquatic and terrestrial respiration.
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| Terrestrial Respiration | Aquatic Respiration | |
| 1. | Respiration is through lungs. | Respiration is through gills. |
| 2. | Air contains more oxygen so organism will not have to spend more energy. | Diffusion of oxygen is less in water so aquatic organism will have to spend more energy. |
| 3. | occurs in organisam living in the land. | occurs in organisam living in the water. |
| 4. | Terrestrial animals respire by lungs and they have a soft, slippery skin. | Aquatic animals respire by gills and they have a leathery hard or spiny skin. |
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