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A major invertebrate phylum of the animal kingdom, the annelids number more than 9,000 species distributed among three classes: the marine worms (Polychaeta), which are divided into free-moving and sedentary, or tube-dwelling, forms; the earthworms (Oligochaeta); and the leeches (Hirudinea). ...
- What kingdom do annelids belong to?
- What type of animals are annelids?
- What are the characteristics of Kingdom Annelida?
- What are the 3 classes of annelids?
- What are examples of Hirudinea?
- Which of the following animal belongs to the phylum Arthropoda?
- What animal eats annelids?
- Is a leech an annelid?
- What are the most common types of annelids?
- What differentiates Polychaetes from other annelids?
- What do annelids have that other worms do not?
- Which of the following animals are true Coelomates with bilateral symmetry?
What kingdom do annelids belong to?
Phylum Annelida is a very broad phylum belonging to the kingdom Animalia. The Annelids are found in aquatic as well as terrestrial environments. These are bilaterally symmetrical invertebrate organisms.
What type of animals are annelids?
The annelids include earthworms, polychaete worms, and leeches. All members of the group are to some extent segmented, in other words, made up of segments that are formed by subdivisions that partially transect the body cavity. Segmentation is also called metamerism.
What are the characteristics of Kingdom Annelida?
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.
What are the 3 classes of annelids?
Critical appraisal. Most authors accept the annelids as having three major classes: Polychaeta, Oligochaeta, and Hirudinea. Older systems would place the polychaetes and oligochaetes under the class Chaetopoda because both groups possess setae.
What are examples of Hirudinea?
The class Hirudinea in the phylum Annelida (segmented worms) comprises the leeches, the most highly specialized of the major annelid groups. Leeches are typically dorsoventrally flattened annelids with suckers at both ends and 34 body segments (designated I-XXXIV) which are externally divided into a number of annuli.
Which of the following animal belongs to the phylum Arthropoda?
Many familiar species belong to the phylum Arthropoda—insects, spiders, scorpions, centipedes, and millipedes on land; crabs, crayfish, shrimp, lobsters, and barnacles in water (Fig. 3.72). Arthropods are considered the most successful animals on Earth.
What animal eats annelids?
Predators - They are a major part of the diet for many Fish, Moles, Hedgehogs, Black Bird etc. A variety of other Birds, Mammals, Reptiles, other Annelids etc. are Predators of Annelids.
Is a leech an annelid?
leech, (subclass Hirudinea), any of about 650 species of segmented worms (phylum Annelida) characterized by a small sucker, which contains the mouth, at the anterior end of the body and a large sucker located at the posterior end. All leeches have 34 body segments. ... Leeches occur primarily in fresh water and on land.
What are the most common types of annelids?
Earthworms. Earthworms are probably the best known and most common of the annelids; more than 2,700 kinds of earthworms have been identified around the world.
What differentiates Polychaetes from other annelids?
Polychaetes differ from other annelids in having a well differentiated head with specialized sense organs and no clitellum. They have many setae, usually arranged in bundles on the parapodia. ... The sense organs in polychaetes are more highly developed than in oligochaetes.
What do annelids have that other worms do not?
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.
Which of the following animals are true Coelomates with bilateral symmetry?
Annelids found in marine , freshwater and brackish water. They are the true coelomates with bilateral symmetry.
