Question

Kyle finds an invertebrate outside in the dirt. The invertebrate has a long, tube-like body that is divided into many different parts. He researches the organism and finds out that it has a nervous system, blood vessels, and a long digestive tube that runs down the length of its body. It can also absorb dissolved oxygen through its skin.

The organism that Kyle found is most likely a(n) _______.
echinoderm
segmented worm
mollusk
arthropod