The photo below shows an enlarged image of a tapeworm. This allows them to feed off of the food that is being digestedīy the host. Worms live inside vertebrate organisms and attach, using suckers and hooks, to the host
Tapeworms are particularly interesting as adult The majority are hermaphroditic, so they contain both male and female reproductiveĪn example of flatworms is tapeworms. Some are parasitic and rely on obtaining nutrients from other organisms to survive. Take in food and as an anus to remove waste.
Most flatworms rely on a single opening that acts as a mouth to Times.” While flatworms do have a central nervous system, they do not have a specializedĬirculatory system. The prefix triplo- in this term means “three So they are referred to as triploblastic. Their bodies are made up of three layers, Their bodies are bilaterally symmetrical, which means that if they are split lengthwaysĭown the middle, each side will be the same. (bottom) areas of their bodies can be identified. Allįlatworms, as the name indicates, have a very flat body. Organisms belonging to phylum Platyhelminthes are commonly called flatworms. Organism to defend itself against predators. Cnidocytes areĬommonly called stinging cells and are important in capturing prey and in helping the Is formed of two layers, with the external layer possessing cnidocytes. Surround an opening that functions as both a mouth and an anus. These organisms do not possess a head but do have appendages, called tentacles, that Phylum Cnidaria is a group that is largely composed of aquatic animals, such as hydras,Īnemones, and jellies, which can live individually or in groups called colonies. Using our knowledge of the animal kingdom and looking back at our answer options, weĬan see that the only correct option is option D. Their bodies and extracting tiny organic particles and very small organisms like AsĪdult sponges cannot move, they obtain their nutrition by filtering water through Animals, however, must consume other organic material to obtain their nutrition. They cannot synthesize their own food, unlike plants, which produce their own sugars. Third, all organisms belonging to kingdom Animalia are heterotrophs. This means that their cells contain a nucleus, whichĬontains the genetic material of the organism. That their bodies are made up of more than one cell. Let’s recap the main features of the organisms belonging to the animalįirst, all organisms belonging to the animal kingdom are multicellular. Surprisingly, they are classified asĪnimals. They are multicellular and heterotrophic.Īdult sponges, like the one shown here, are immobile invertebrates that are oftenįound in marine environments, such as oceans.They are multicellular and autotrophic.They are eukaryotic and reproduce asexually.They are unicellular and reproduce sexually.
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