Broader definitions of chemicals or chemical substances can be found, for example: the term 'chemical substance' means any organic or inorganic substance of a particular molecular identity, including â (i) any combination of such substances occurring in whole or in part as a result of a chemical reaction or occurring in nature.
The major groups of worms include various species of flatworm, annelid, ribbon worm, spiny-headed worm, and aschelminth. Worms typically have an elongated, tubelike body, usually rather cylindrical, flattened, or leaflike in shape and often without appendages.
Below is a flatworm and a parasitic worm. Pictures are fromhttp://www.soest.hawaii.edu/marlin/tribollet/belles%20photos/flat%20worm.jpg. Worms are in the category invertebrates, and 95% of animals are invertebrates.Other animals in their invertebrate category, are insects, starfish, and a lot more.elow is a flatworm and a parasitic worm. Pictures are fromhttp://www.soest.hawaii.edu/marlin/tribollet/belles%20photos/flat%20worm.jpg. Worms are in the category invertebrates, and 95% of animals are invertebrates.