Invertebrates are the animals which do not have a vertebral column in the body.
Vertebral column is a long bone enclosed column present on the dorsal side of the animals.
In this vertebral column, one of the important organs of the body namely spinal chord is housed safely.
This vertebral column gives support to the entire animal’s body.
The vertebral column has ring like bones arranged one over the other.
Examples of Invertebrates
- Flat and round worms
- Ctenophore (comb jellies)
- round worms
Insects: These are six legged animals with an ability to fly. They one of the largest class of animals. They do not have the vertebral column. They also lack the spinal cord but instead they posses a exoskeleton made of cuticle.
Examples of insects include:
f) Termites like those on dogs etc.
Molluscans: These are the animals which have flexible, soft and stout bodies. They are of different shapes and lack a vertebral column. Perhaps presence of vertebral column in these animals would not permit their flexible nature of the body. Most of them are marine while few of them live in fresh water and land.
d) Star fish.
f) Squid etc. These are also the examples of marine invertebrates.
Examples of echinoderms invertebrates:
a) Star fish
b) Sea cucumber
c) Sea Urchin.
Arthropods: These animals have many legs and the legs are jointed. They also include insects but those without an ability to fly will be discussed here.
Annelids: These animals creep and crawl on the ground. They have annules or rings on the entire body, i.e. their body is cylindrical with many ring like annules. They do not have legs and also vertebral column.
Examples under annelids
Flat worm/ round worms: These are helminth parasites living in humans and other mammalian digestive tract. They do not have limbs and also vertebral column.
Examples of platyhelminthes invertebrates:
a) Taenia solium
c) Wuchereria bancrofti.
From the list mentioned above, we can answer few questions like
1. Examples of parasitic invertebrates: These include helminth parasites, ectoparasites (leech), lice etc.
2. Examples of mollusks invertebrates: Corals, Star fish, octopus, etc.