Phylum

INTRODUCTION Animals atomic number 18 eukaryotic organisms without cell walls and feed heterotrophically. Animals depict a high level of tissue variousiation whereby similar cells usage on collectively leading to the development of tissues and organs which capture different parts of the proboscis to perform different functions. each animals adopt nervous coordination and a muscle system with rapidly rejoinder to environmental stimuli. Organisms are grouped into categories that represent lines of evolutionary descent. The landed estate of animalia is divided into nine phyla: Porifera, Cnidaria, Patyhelminthes, Nematoda, Annelida, Arthropoda, Mollusca, Echinodermata, and Chordota. Sponges are animals of the phylum Porifera. They are cellular organisms which down bodies full of pores and channels allowing peeing to circulate with them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells. Sponges swallow un narrow cells that tai l assembly transform into other types and which often migrate between the primary(prenominal) cell layers and the mesohyl in the process. Sponges do not have nervous, digestive or circulatory systems. Instead, most rely on maintaining a constant water flow through their bodies to gravel food, group O and remove wastes.

Cnidaria is a phylum containing over 10,000 species of animals found just in aquatic and mostly nautical environments. Their distinguishing feature is cnidocytes, specialized cells that they use mainly for capturing prey. Their bodies consist of mesoglea, a non-living jelly-like substance, sa ndwiched between two layers of epithelium th! at are mostly virtuoso cell thick. They have two basic body forms: liquid medusae and sessile polyps, both of which are radially symmetrical with mouths meet by tentacles that eject cnidocytes. Both forms have a angiotensin converting enzyme orifice and body cavity that are used for digestion and respiration. many an(prenominal) cnidarian species expose colonies that are single organisms composed of medusa-like or polyp-like zooids, or both....If you call for to get a full essay, read it on our website: BestEssayCheap.com

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