Before we learn about worms, let us first understand what the term "invertebrate" means. An invertebrate is any animal that lacks a vertebral column or backbone. Invertebrates can include organisms like protozoans, echinoderms, nematodes, mollusks, cnidarians, annelids, flatworms and arthropods. About 92 percent of living animals in this planet are invertebrates. Invertebrates are usually soft-bodied and have an external skeleton for protection.
Worms are thousands of species of various invertebrate animals or insects that have a soft, slender, elongated body without appendages. The major phyla are flatworms (Platyhelminthes), annelids (Acanthocephala), ribbon worms (Nemertea) and nematodes (Aschelminthes). Worms can be as minute as microscopic or as long as 100 feet, as in the case of some ribbon worms. Worms are found to habituate on land as well as in water. They can be either living freely or harbouring a parasitic form of existence. They form a crucial link in the food chain in the eco-system.
Worms are thousands of species of various invertebrate animals or insects that have a soft, slender, elongated body without appendages. The major phyla are flatworms (Platyhelminthes), annelids (Acanthocephala), ribbon worms (Nemertea) and nematodes (Aschelminthes). Worms can be as minute as microscopic or as long as 100 feet, as in the case of some ribbon worms. Worms are found to habituate on land as well as in water. They can be either living freely or harbouring a parasitic form of existence. They form a crucial link in the food chain in the eco-system.
