Nematodes (roundworms) have elongated, bilaterally long cylindrical bodies which contain an intestinal system and a large body cavity. Parasitic nematodes vary in length from several millimetres to approximately 2 metres and have larval stages and adult worms of both sexes. 11 нояб. 2014 г.
What is the characteristics of nematodes roundworms?
Characteristics of Nematoda They are cylindrical in shape. They exhibit tissue level organization. Their body has a cavity or pseudocoelom. The alimentary canal is distinct, with the mouth and the anus.
What are the characteristics of a roundworm?
Features of RoundwormsUnlike the flatworms, the roundworms have a body cavity with internal organs.A roundworm has a complete digestive system, which includes both a mouth and an anus. ... Roundworms also have a simple nervous system with a primitive brain.Roundworms | CK-12 Foundation
What are the general characteristics of nematodes?
Nematodes are bilaterally symmetrical, elongate, and usually tapered at both ends. Some species possess a pseudocoel, a fluid-filled body cavity between the digestive tract and the body wall. Like arthropods and members of six other phyla, nematodes secrete an external cuticle that is periodically molted.
What is nematodes or roundworms?
Roundworms (nematodes) are bilaterally symmetrical, worm-like organisms that are surrounded by a strong, flexible noncellular layer called a cuticle. Their body plan is simple. The cuticle is secreted by and covers a layer of epidermal cells.
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