The development of wings went hand in hand with other morphological modifications which included the development of strong thoracic muscles required for propelling the insect in the air. The wings were specialized to translate the force generated from the axillary apparatus for flying. Wings are attached to the direct muscular system of the insect which either contracts or relaxes to adjust the position of the wings for movement in the air (Thomas, Reynolds & Woiwood, 2001). In addition, there are also indirect muscles.
Flying demands a lot of metabolic energy which translates to mean that insects have evolved a complex physiological system to respond to their flight energy requirements.
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