Essay On Phylum Annelida Free Essays - StudyMode

All of the animals have symmetry. Sponges are different from other phylum. Sponges are asymmetry while the annelids, mollusks, arthropods, vertebrates have a bilateral symmetry and that make the sponges different form the other animal groups. The sponges and the Cnidarians jellyfish both have a dead end digestive system and that make the sponges have something in common with one of the groups. Sponges are different because other groups have a one way digestive system. Another similarities between sponges and arthropods are that they both filter food particles from water by trapping it in their choanocytes. Then the food is digest inside it cells. The sponges and jellyfish both digest their food in their digestive cavity and they use neumatocytes (stings the prey) to capture the food. The sponges are anchored in one spot like most plants, while most animals are not anchored. are that the sponges have a bilateral symmetrical system and they have a choanocytes. They are also anchored in one spot.

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A phylum is a group of organisms that have similar characteristics. There are many different groups of phyla The phyla consist of sponges, Cnidaria (Jellyfish), annelids (worms), mollusks (clams), arthropods, and vertebrates. Through out this essay you will learn about these phyla. You will also have an idea of how they are different.


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Phylum Annelida Essay - 516 Words - StudyMode

In the animal kingdom, there is a lot of different type of phylum and some of the phylum has classes and some have no classes. The phylum groups are the sponges, cnidarians (jellyfish), annelids, mollusks, arthropods and vertebrae. Cnidarian's classes are jellyfish (hydrozoam), and sea anatomies. Annelids consist of earthworms and polychaetes. Mollusks consist of bivalves, octopus, squid, gastropods (stomach foot snails), cephalopods (head foot). Arthropods consist of millipods, centropods, insects, arachnids, crustaceans, horseshoe crab, and sea spiders. Vertebrates consist of amphibians, reptiles, avies (birds), mammals and fishes.


Living things are made up of cells

When you think of the word "animal", the first thing that pops into your head are warm blooded animals. Most people do think that. Actually, the animal kingdom is divided into six phylums: sponges, cnidarians (jelly fish), annelids (worms), mollusks, arthropods, and vertebrates. Within these phylums, are the different classes of each group. Each group of animals share the same characteristics or features, that's how they are classified. Even though they are all different, some do share the same characteristics. In the following paragraphs, you will learn more about each phylum and their characteristics. Also, you will see the similarities between each group.

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The fourth phylum is the mollusks. They have a bilateral symmetry and a one-way digestive system, like the annelids. Mollusks have a three-part body plan: the foot, the visceral mass, and the head. They also are the first group of animals to have developed a coelom, which is a fluid and filled body cavity that is developed within the mesoderm. This group is separated into three classes: bivalves, gastropods, and cephalopods. Bivalves, like the clam have two shells or valves and three layers. These animals are omnivores (planktavores), and have a mantle, abductor muscles, siphons and gills. An example of a gastropod is snails and they live anywhere. Obviously, they have one shell and also include gills and lungs. The last class is cephalopod and an example of that are squids and octopuses. They have gills like the rest of them and a mantle like the clams. These animals are the only ones in this phylum that have arms, tentacles and suckers.