Table of Contents
Is an earthworm an annelid?
earthworm, also called angleworm, any one of more than 1,800 species of terrestrial worms of the class Oligochaeta (phylum Annelida)—in particular, members of the genus Lumbricus.
How does this annelid differ from an earthworm?
They differ from earthworms in that they are flatter and actually lack a complete coelomic cavity; which most annelids do have. They also possess “suckers” at the head and tail ends. The ectoparasite we all call the leech.
What do annelids have that other worms dont?
In addition to a more specialized complete digestive system, annelid worms have also evolved body features not found in flatworms or nematodes. These features appear in some form in all larger, more complex animals: a coelom, a body cavity between the digestive tube and the external body wall that is lined with tissue.
Why is earthworm an annelid?
Earthworms belong to a class of terrestrial annelids. Hence, earthworms share the characteristics of a typical annelid such as rounded body with segments, presence of a body cavity, complete digestive system, closed circulatory system, and hermaphroditic reproduction.
How can you explain the difference between a nematode and an annelid?
The key difference between nematodes and annelids is that nematodes are roundworms which are not segmented while annelids are true segmented worms. The presence and absence of a true coelom is another difference between nematodes and annelids. Nematodes possess a pseudocoelom while annelids possess a true coelom.
What is the taxonomic classification of earthworm?
Clitellata
Earthworm/Class
What is the characteristics of annelid?
Characteristics of Phylum Annelida They have a long and segmented body. Annelids are bilaterally symmetrical. They are triploblastic. Also, they exhibit organ system grade of organisation, showing organ differentiation.
Which one of the following is not an annelid *?
Explanation. Sea urchins are spiny sea creatures that are round and prickly like hedgehogs. They belong to Echinoderm phylum.
How do annelid animals differ from arthropods?
Hint: Annelids are the animals that are referred to as segmented worms, while arthropods are referred to as animals with jointed legs….Complete answer:
| Characteristics | Phylum Annelida | Phylum Arthropods |
|---|---|---|
| Sexes | Hermaphrodite | Unisexual |
| Circulatory system | Closed | Open |
| Respiratory organ | skin | Lungs, gills, trachea |