Aim Our aim was to dissect a locut to observe the inner workings and gain a better understanding of the respiratory system of locust and insects by examining the;
Equipment
Safety Concerns Tale caution when handling sharp tools such as the scalpel, Scissors and Pins and make sure not to cut yourself or anyone else. Also you may want to wear gloves or wash your hands regularly to reduce the risk of contracting any disease the dead insect may have. Method of dissection
Insect Respiratory System
Air enters the insect's body through valve-like openings in the exoskeleton. These openings (called spiracles) are located laterally along the thorax and abdomen of most insects. Air flow is regulated by small muscles that operate one or two flap-like valves within each spiracle, contracting to close the spiracle, or relaxing to open it. After passing through a spiracle, air enters a tracheal, eventually diffusing throughout a complex, branching network of tracheal tubes that divide into smaller and smaller diameters and reach every part of the body. At the end of each tracheal branch, a special cell (the tracheae) provides a thin, moist interface for the exchange of gasses between atmospheric air and a living cell. Oxygen in the tracheal tube first dissolves in the liquid of the tracheole and then diffuses into the cytoplasm of an adjacent cell. At the same time, carbon dioxide, produced as a waste product of cellular respiration, diffuses out of the cell and, eventually, out of the body through the tracheal system and out through the spiracles.
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Jack BojanArdingly College Archives
March 2017
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