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Biological Evolution: Unity and Diversity: Vertebrates and Invertebrates
Roundworms
Description
Roundworms
Roundworms, also known as nematodes, are simple animals characterized by their long, narrow bodies composed of many cells organized into distinct systems. They have a digestive tube that runs from their mouth to their anus, a nerve cord, and muscles that enable them t...
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Transcript
Did you know a worm can live in a dog’s heart? It's hard to believe, but it’s true. This parasite is called heartworm.
Heartworms are roundworms that belong to the phylum Nematoda. Roundworms are smooth, legless worms with several defining features.
These worms are bilaterally symmetrical and have a body cavity that holds their organ...
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