What type of symmetry do segmented worms have?

What type of symmetry do segmented worms have?

bilateral symmetry

How would you describe a segmented worm?

Features of Segmented Worms Segmented worms have a number of characteristic features. The basic form consists of multiple segments, each of which has the same sets of organs and, in most, a pair of parapodia that many species use for locomotion. Segmented worms have a well-developed body cavity filled with fluid.

How are segmented worms different from other worms?

Segmented worms have a well-developed body cavity filled with fluid, which serves as a hydroskeleton, a supportive structure that helps move the worm’s muscles. Segmented worms also tend to have organ systems that are more developed than the roundworms or flatworms.

Is an earthworm a segmented worm?

Earthworms are classified in the phylum Annelida or Annelids. Annelida in Latin means, “little rings.” The body of the earthworm is segmented which looks like many little rings joined or fused together. The earthworm is made of about 100-150 segments. The segmented body parts provide important structural functions.

What do flatworms and segmented worms have in common?

All of them are invertebrates. They all have long, narrow bodies without legs. All worms also have tissues, organs, and organ systems. Worms have bilateral symmetry.

Do flatworms have setae?

Flatworms do not have this; their bodies, instead, are covered with cilia, hairlike growths. The gliding locomotion of a flatworm is powered by many tiny cilia on the outer surface of its body.

Do flatworms have eyespots?

Planarian flatworms, which often live in dark, watery environments shielded from direct light, don’t have complex eyes like we do. But many do have two lensless, primitive “eyespots” on their heads that can detect the intensity of light.

Do flatworms have simple brains?

They have a central nervous system containing a brain and a nerve cord. Clusters of light-sensitive cells on either side of their head make up what are called eyespots. The head region of the flatworm has other paired sense organs connected to the flatworm’s simple brain.