The roundworm's body is a function of a parasite because it gets stronger when it eats digested food in animal's body and that harms the animal. They are in the same body and the parasite lives on the host.
What type of body plan do roundworms have?
Nematodaroundworms Roundworms are bilaterally symmetrical, worm-like organisms that are wrap by a strong, flexible noncellular layer called a cuticle.
Their body plan is simple. The cuticle is secreted by and surrounds layer of epidermal cells.
Thus, They are in the same body and the parasite lives on the host.
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