Long answer type questions. Name the major invertebrate phyla and give their important characters
Invertebrates are classified into several phyla. The major ones are described below:
Porifera - They are sponge like creatures that lives underwater. They are asymmetrical in nature and has no true body cavity. Examples: Demosponges, sea sponges, etc.
Cnidaria - They are jelly like creatures made up of connective tissues. They have radial symmetry and has no true body cavity. Examples: Jellyfish, sea anemones, etc.
Platyhelminthes - They are free living creatures with a flattened body and no body cavity. It has distinct head and tails and exhibit bilateral symmetry. Examples: Tapeworm, planaria, etc.
Nematoda - They are free living cylindrical bodies with no specific body segments. They exhibit bilateral symmetry. Examples: Roundworms, Hookwarm, etc.
Annelida - They are free living cylindrical bodies with specific body segments and well developed organs. They exhibit bilateral symmetry. Examples: Earthworm, leeches, etc.
Mollusca - They are soft body creatures covered by hard shell like structures. They exhibit bilateral symmetry. Examples includes Squid, snails, etc.
Echinodermata - They have arm like structures, usually five in number. They are marine environments with tube feet and exhibits radial symmetry. Examples: Sea urchins, starfish, etc.
Arthropoda - They are exoskeleton structures with segmented bodies and multiple legs. They exhibit bilateral symmetry and they have to shed their exoskeleton and grow a new as they grow. Examples: Insects, Spiders, etc.
Invertebrates are classified into several phyla. The major ones are described below:
Porifera - They are sponge like creatures that lives underwater. They are asymmetrical in nature and has no true body cavity. Examples: Demosponges, sea sponges, etc.
Cnidaria - They are jelly like creatures made up of connective tissues. They have radial symmetry and has no true body cavity. Examples: Jellyfish, sea anemones, etc.
Platyhelminthes - They are free living creatures with a flattened body and no body cavity. It has distinct head and tails and exhibit bilateral symmetry. Examples: Tapeworm, planaria, etc.
Nematoda - They are free living cylindrical bodies with no specific body segments. They exhibit bilateral symmetry. Examples: Roundworms, Hookwarm, etc.
Annelida - They are free living cylindrical bodies with specific body segments and well developed organs. They exhibit bilateral symmetry. Examples: Earthworm, leeches, etc.
Mollusca - They are soft body creatures covered by hard shell like structures. They exhibit bilateral symmetry. Examples includes Squid, snails, etc.
Echinodermata - They have arm like structures, usually five in number. They are marine environments with tube feet and exhibits radial symmetry. Examples: Sea urchins, starfish, etc.
Arthropoda - They are exoskeleton structures with segmented bodies and multiple legs. They exhibit bilateral symmetry and they have to shed their exoskeleton and grow a new as they grow. Examples: Insects, Spiders, etc.
