List four conditions required for efficient gas exchange in an organism.
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1. Large surface area for easy gas exchange.
2. Fine and delicate surface for easy exchange of oxygen and carbon dioxide.
3. Mechanism for moving air in and out of the respiratory surface.
4. Placement of respiratory surface within the body for protection.
2. Fine and delicate surface for easy exchange of oxygen and carbon dioxide.
3. Mechanism for moving air in and out of the respiratory surface.
4. Placement of respiratory surface within the body for protection.
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