They are both worms.
gopigos islands
Roundworms and flatworms do not have backbones. All worms are invertebrates.
1.- Flatworms 2.-Segmentedworms 3.-Roundworms
The man kinds of plylas' are flatworms, roundworms, and segmented worms.
Earthworms are a type of worm; there are many other types including roundworms, flatworms, marine worms, and bristle worms.
There are three different groups of animals known as "worms": flatworms (phylum: Platyhelminthes), roundworms (phylum: nematoda), and segmented worms (phylum: annelida).
earthworms have clitellum and roundworms dont. earthworms are from the member of phlyum annelidia and roundworms are from the member of the phylum nematoda. Earthworm's have 5 aortic arches(hearts) which roundworms do not ! :)
(it would be false to say that all flatworms are parasitic--the idiot that wrote that wasn't so smart, so I had to change that-- because the PLANARIAN-for example, is flatworm and that is a harmless little critter) ~round worms are ROUND ~flat worms are FLAT ~Round worms have 2 body openings (mouth & anus) *random fact: 1/2 of all roundworms are PARASITIC, and 50 species affect humans**
While both flatworms and roundworms are soft-skinned invertebrates, their biology differs greatly enough to put them into to distinct categories. Flatworms belong to the phylum Platyhelminthes, while roundworms belong to Nematode.Flatworms have flat, ribbon shaped bodies, while roundworms are round (but not segmented) and taper towards the end. Both are bilaterally symmetrical. Roundworms are sexed, with two different genders, while flatworms may either be sexed, hermaphroditic, or use asexual reproduction.
they all have different shaped bodies and different characteristics
Worms belong to various phyla depending on their specific characteristics. Common phyla that worms can belong to include Annelida (segmented worms), Nematoda (roundworms), Platyhelminthes (flatworms), and Nemertea (ribbon worms).