How are flat and round worms similar?

Flatworms and roundworms have both a number of similarities and a number of differences. So, both of them have a nodal type of nervous system, but they lack the respiratory and circulatory systems, the musculoskeletal system is a skin-muscular sac. Their body shape is elongated and they have bilateral symmetry. Round and flatworms are three-layered representatives of the animal kingdom.



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