an open circulatory system
No: in fact, parasites such as flatworms and roundworms also prey on earthworms. Earthworms are highly beneficial, not feeding off living organisms, but breaking down decomposing organic material.
Comparten muchas características, es decir, son similares porque no tienen columna vertebral sino exoesqueleto y otros tienen cuerpo y patas articuladas y más características.They share many characteristics, that is, they are similar because they do not have a spine but an exoskeleton and others have articulated body and legs and more characteristics.
They express the characteristics inherent to arthropods. All insects are arthropods. Not all arthropods are insects.
Jointed legs, exoskeleton, growth by molting.
They express the characteristics inherent to arthropods. All insects are arthropods. Not all arthropods are insects.
Arthropods have segmented bodies, an exoskeleton made from chitin, and joint appendages. They also have an internal body cavity (hemocoel) and an open circulatory system which employs hemolymph.
All arthropods have exoskeletons and joint appendages.
No they aren't, they sometimes attack earthworms, ants, snails, shellfish and many other arthropods.
Earthworms decompose dead organisms
The arthropods all share membership in the phylum Arthropoda. Arthropods are characterized by segmented bodies, an exoskeleton made from chitin, and joint appendages.
jointed legs
Arthropods are characterized by segmented bodies, an exoskeleton made from chitin, and joint appendages.