The May beetle has three pairs of legs, one pair on each of the three breast segments. Each leg consists of several movable segments and ends in claws with which the beetle clings to the leaves and bark of trees. In addition, the beetle digs the ground with its front legs, where females lay eggs. This is why these legs are very strong and resemble sturdy scrapers.
In crayfish: The body of crayfish, like other arthropods, is externally covered with a strong chitinous cuticle. It is impregnated with calcium carbonate, which gives it extra strength. Outside the aquatic environment, crayfish quickly dry out and die, since the integuments of the body do not have an external waxy layer and therefore do not interfere with the evaporation of water.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.