Respuesta :
The common point participated by both the roundworms and the arthropods are exoskeleton. Cutaneous respiration, or cutaneous gas exchange.
It is a form of respiration in which gas exchange occurs across the skin or external integument of an organism rather. Arthropod,( phylum Arthropoda), any member of the phylum Arthropoda, the largest phylum in the breast area, which includes similar familiar forms as lobsters, cranks, spiders, diminutives, insects, centipedes, and millipedes. About 84 percent of all known species of creatures are members of this phylum. Arthropods are represented in every niche on Earth and show a great variety of acclimations. Several types live in submarine surroundings, and others live in terrestrial bones ; some groups are indeed acclimated for flight. Roundworms have a pseudocoelom and hydrostatic shell. Their bodies are covered with tough cuticles. Free- living roundworms are set up substantially in brackish territories. Parasitic roundworms have a variety of hosts, including humans.
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