discuss structural adaptations that function in oxygen exchange between each of the following (insect, fish, p


discuss structural adaptations that function in oxygen exchange between each of the following (insect, fish, plant) and its environment

Insects respire through small openings in the abdomen called spiracles. These openings lead directly into the insects "circulatory system" which is an open and relatively unconfined system of oxygen carrying cells in a clear fluid. Some insects, especially in the larval stage, respire with gills.

Fish have true gills. Oxygen is absorbed from water as it passes over feather like organs that have specialized cellular structures for absorbing oxygen. Gills are often fibrous to increase surface area for greater gas exchange.

Plants do require oxygen for respiration. During the day plants absorb carbon dioxide, used in the process of photosynthesis and at night, they absorb oxygen to complete respiration.

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