EVERYDAY SCIENCE

Detailed explanation-1: -Most arthropods move by means of their segmental appendages, and the exoskeleton and the muscles, which attach to the inside of the skeleton, act together as a lever system, as is also true in vertebrates. The external skeleton of arthropods is a highly efficient system for small animals.

Detailed explanation-2: -Movement. Since exocuticle is absent from joints, arthropods can move appendages and flex one body segment on another. Movement results from contraction and relaxation of striated muscle fibres. Most arthropods use their appendages for movement, for example, as paddles in aquatic species or as legs in terrestrial ones.

Detailed explanation-3: -These jointed appendages may include legs, wings and mouthparts. These appendages help the arthropods in having greater flexibility and greater range of movement. The joints in the appendages are helpful for the expansion and growth of the exoskeleton. Arthropods are rightly called animals with jointed appendages.

Detailed explanation-4: -In arthropods, each of the leg segments articulates with the next segment in a hinge joint and may only bend in one plane.

Detailed explanation-5: -Insects belong to the phylum arthropoda. Arthropods move with the help of jointed appendages.