Of these, three common types of worms are: the flatworm, the roundworm, and the segmented worm. Flatworms are soft, unsegmented invertebrates.
What are the 3 classes of worms?
Worms are classified into three major phyla, or groups. They are flatworms, roundworms, and segmented worms. Flatworms belong to the phylum Platyhelminthes (plat ee hel MIN theeze). Most flatworms are parasites that obtain their food from a host animal.
What are the three types of worms and how are they different?
Three types of worms with different body types will be explored in this lesson: Flatworms, which have ribbon-like bodies with no body cavity. Roundworms, which have a body cavity but no segments. Segmented worms, which have both a body cavity and segmented bodies.
What are 3 characteristics of worms?
Characteristics. All worms are bilaterally symmetrical, meaning that the two sides of their bodies are identical. They lack scales and true limbs, though they may have appendages such as fins and bristles. Many worms have sense organs to detect chemical changes in their environments, and some have light-sensing organs.
How many types of worms are there?
There are at least 20,000 species, or kinds, of worm. They are not all related. In fact, they belong to several different animal groups. Some well-known groups of worms are flatworms, roundworms, and segmented worms.
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