Roundworms have a tough covering of cuticle on the surface of their body. It prevents their body from expanding. This allows the buildup of fluid pressure in the pseudocoelom. As a result, roundworms have a hydrostatic skeleton. 5 мар. 2021 г.
What system do roundworms not have?
While nematodes have digestive, reproductive, nervous and excretory systems, they do not have discrete circulatory or respiratory systems.
What systems do roundworms have?
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 type of internal skeleton do roundworms have?
As a result, roundworms have a hydrostatic skeleton. This provides a counterforce for the contraction of muscles lining the pseudocoelom. This allows the worms to move efficiently along solid surfaces.
Do roundworms have a vertebrate?
Roundworms are invertebrates in Phylum Nematoda. This is a very diverse phylum. It has more than 80,000 known species.
More useful articles on a similar topic 👇
Why do roundworms have a round body?What phylum are roundworms and hookworms?