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Direct flight muscles

Direct flight muscles are found in all insects and are used to control the wing during flight.

However, in insects such as dragonflies and cockroaches, direct flight muscles are used to power flight too. The wings pivot up and down around a single pivot point. The wings are raised by a contraction of muscles attached to the base of the wing inside (toward the middle of the insect) the pivot point. The wings are then brought down by a contraction of muscles that attach to the wing outside of the pivot point.

Illustration of the operation of an insect's wings using direct flight muscles

Illustration of the operation of an insect's wings using direct flight muscles. The darker muscles are those in the process of contracting.

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