Question

Why are the muscles used for movement in insects often pennate?

The internal muscle includes both flexor and extensor muscles.

Insects require muscle that generates large length changes to compensate for lack of joints in the skeleton.

Insects molt to grow their skeleton.

The limited space within insect exoskeletons requires muscle that generates high force without changing size significantly.

Answer 1

Why are the muscles used for movement in insects often pennate?

The correct answer is.............The limited space within insect exoskeletons requires muscle that generates high force without changing size significantly.

• Insects muscles which show movement are pennate.
• Insects legs are slender.
• The slender legs show presence of tubular skeletons.
• As the skeleton is tubular and slender in insects and the muscle to get fit into it should not be stout.
• The pennate muscle fibers get attached to tendons and create more tension than parallel muscles.
• The pennate muscle is stronger than parallel muscle.