Insects. Insects evolved on land. Their gas exchange system is the internalized tracheal system, which delivers O2 directly to cells. This means that an open circulation system working at low pressure is adequate to meet the insect’s transport needs, because the thing that needs rapid transport (O2) is transported via an independent system.
Fish Insects Mammals Comparisons Bibliography Gas Exchange in Fish. Environment Fish live in water, which has a low concentration of oxygen. This means lots of water has to flow over the gas exchange surface for the fish to take in enough oxygen.
Mammals have a circulatory system, so their size isn't limited by their gas exchange system. Because mammals breathe air, unwanted particles sometime get into the gas exchange system. There is mucus in the trachea and bronchioles to keep them clean and moist.Fish live in a moist environment so do not need to use energy to keep their gas exchange surface moist like insects and mammals do. Both insects and mammals have internalised gas exchange surfaces to keep them moist and reduce water loss via evaporation. Mammals have a mucus lining on the trachea and alveoli to maintain the moist surface.This increases the efficiency of the mammalian gas exchange system and the rate in which oxygen is diffused into the blood. Insects do not have a circulatory system. Therefore in their gas exchange system the oxygen is directly diffused from the air to the cells, and through the tracheoles.
Similar to mammals, birds have lungs, which are organs specialized for gas exchange. Oxygenated air, taken in during inhalation, diffuses across the surface of the lungs into the bloodstream, and carbon dioxide diffuses from the blood into the lungs, and is then expelled during exhalation.Read More
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Essay Gas Exchange: Mammals, Fish And Insects. Gas Exchange in Mammals, Fish and Insects Gas Exchange is a biological delivery of oxygen from the air or water to the bloodstream or cells in the bodies of mammals, fish or insects while also getting rid of carbon dioxide.Read More
Gas exchange is the process by which oxygen and carbon dioxide (the respiratory gases) move in opposite directions across an organism's respiratory membranes, between the air or water of the external environment and the body fluids of the internal environment.Read More
Start studying 2: Gas exchange in fish, insects and birds. Learn vocabulary, terms, and more with flashcards, games, and other study tools.Read More
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Insects have tracheae which allow for gas exchange but also prevents water loss; The gases enter through the open spiracles along a concentration gradient; The tracheae move the oxygen to call cells which are closely associated with cells; The tracheae divide into small dead-end tubes called tracheoles.Read More
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Start studying AQA Biology (as level) - Gas exchange in fish, insects and plants (exchange and transport systems). Learn vocabulary, terms, and more with flashcards, games, and other study tools.Read More