Does A Roundworm Have Tissues? All worms also have tissues, organs, and organ systems. Worms have bilateral symmetry. Unlike sponges or cnidarians, worms have distinct head and tail ends. Worms are the simplest animals with a brain. How many tissue layers do roundworms have? Taxonomic level: phylum Nematoda; grade of construction: organs derived from three
What Tissue Layers Do Flatworms Have? Flatworms have three embryonic tissue layers that give rise to surfaces that cover tissues (from ectoderm), internal tissues (from mesoderm), and line the digestive system (from endoderm). What are the tissue layers in flatworms? The flatworms are acoelomate triploblasts—i.e., they lack a body cavity and have three embryonic tissue
What Do Flatworms And Cnidarians Have In Common? Like the cnidarians, flatworms have a digestive system with only a single opening into the digestive cavity, but in independently living marine flatworms the cavity branches into all parts of the body (Fig. … Undigested food passes back out through the mouth, as in the cnidarians. What