Roundworms have a pseudocoelom and hydrostatic skeleton. Their body is covered with tough cuticle. Free-living roundworms are found mainly in freshwater habitats. Parasitic roundworms have a variety of hosts, including humans. 5 мар. 2021 г.
What are 5 characteristics of worms?
They have five paired organs that act like hearts to pump their blood through large blood vessels. They have a brain and nerve cord. They have reproductive organs and waste-removal organs. Well-developed muscles let the worms crawl through the soil or on top of the ground.
What are the 3 characteristics of a worm?
What are 3 characteristics of worms? Worms have a long body with no legs, a distinct head and tail end, are typically small, and have a simple brain connected to a nerve cord.
What are 4 ways flatworms and roundworms are different?
Note: Both flatworms and roundworms can be parasitic or free living. But flatworms have hooks and suckers for adhesion on their host. ... What is the difference between flatworms and roundworms?FlatwormsRoundwormsThey have a thin, dorsoventrally flattened body, so called flatworms.They have a long cylindrical body, vermiform, unsegmented with no lateral appendages.
What is the main characteristic of a worm?
Characteristics. All worms are bilaterally symmetrical, meaning that the two sides of their bodies are identical. They lack scales and true limbs, though they may have appendages such as fins and bristles. Many worms have sense organs to detect chemical changes in their environments, and some have light-sensing organs.
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