Invertebrate animals other than coelenterates are grouped under the following phylum: Each mentioned phylum consists of the particular animals with particular characters as follows:
Phylum Platyhelminthes: This group of animal consists of the animals having dorsoventrally flattened leaf-like body. These animals are also known as flat worms. They are free-living as well as parasitic in habitat. But most of them are endoparsitic i.e. live inside the body of other animals and pass their whole life in this way. They are totally dependant on the other animals for food and oxygen. The animals which harbour them inside their body are called hosts.Animals which live inside the body of other animals are called endoparasites which are different from the ectoparasites which live out side the body and use to suck up the blood from the body of the other animals. Unlike ectoparasites ,endoparasites use to eat the digested food materials from the body of their hosts. Platyhelminth animals are very interesting being the one which show lots of modifications which enable them to live as the parasites. These animals have the hooks and suckers which are very helpful to help them in the parasitic mode of life. Hooks help them to get attach firmly in the soft tissue of the hosts. Suckers help them to suck up the digested food materials from the body of their hosts. Other interesting facts about these animals is that they do not have the locomotary organs for movement. This is because they do not need these organs due to the fact that they get every essential things inside the body of the hosts.
Platyhelminthes or flat worms are hermaphrodite animals that means they have got both the male and the female reproductive organs in the same individual. Such animals are also known as bisexual or monocious..
Phylum Platyhelminthes: This group of animal consists of the animals having dorsoventrally flattened leaf-like body. These animals are also known as flat worms. They are free-living as well as parasitic in habitat. But most of them are endoparsitic i.e. live inside the body of other animals and pass their whole life in this way. They are totally dependant on the other animals for food and oxygen. The animals which harbour them inside their body are called hosts.Animals which live inside the body of other animals are called endoparasites which are different from the ectoparasites which live out side the body and use to suck up the blood from the body of the other animals. Unlike ectoparasites ,endoparasites use to eat the digested food materials from the body of their hosts. Platyhelminth animals are very interesting being the one which show lots of modifications which enable them to live as the parasites. These animals have the hooks and suckers which are very helpful to help them in the parasitic mode of life. Hooks help them to get attach firmly in the soft tissue of the hosts. Suckers help them to suck up the digested food materials from the body of their hosts. Other interesting facts about these animals is that they do not have the locomotary organs for movement. This is because they do not need these organs due to the fact that they get every essential things inside the body of the hosts.
Platyhelminthes or flat worms are hermaphrodite animals that means they have got both the male and the female reproductive organs in the same individual. Such animals are also known as bisexual or monocious..
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