Your email address will not be published. As pieces of a sponge break off they can regenerate into a whole sponge. 2.Are radially symmetrical. They collect the food in specialized cells called choanocytes which are transported throughout the body by amoebocytes. The branch of zoology that studies sponges is known as spongiology. Write. Parazoans (“beside animals”) do not display tissue-level organization, although they do have specialized cells that perform specific functions. (adsbygoogle = window.adsbygoogle || []).push({}); Phylum Porifera Traits and Classification, Gabon, Republic of the Congo, and Sao Tome and Principe Physical Map, Phylum Cnidaria Traits and Classification, Phylum Platyhelminthes Traits and Classification. In the end, the waste products are eliminated through the osculum. This phylum includes about 5000 species. A typical height may be 10 centimeters. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jelly-like mesohyl sandwiched between two thin layers of cells. Sponge, any of the primitive multicellular aquatic animals that constitute the phylum Porifera. They are found in marine and the deep sea. [Click on the thumbnail image for a full-sized image]. Flashcards. 1. Hence: an animal with with pores. They have the power to regenerate the lost parts. Demosponges (Class Demospongiae) are the most diverse class in the phylum Porifera.They include 76.2% of all species of sponges with nearly 8,800 species worldwide (World Porifera Database). Phylum : Porifera or sponges. In addition, they lack muscles or a mouth. Some form crusts, some are simple tubes, some are vase shape while others can be cup shaped, massive clumps, fan shaped, finger like bulges, treelike or even bushy. Phylum PORIFERA – General Characteristics And Classification. They number approximately 5,000 described species and inhabit all seas, where they occur attached to surfaces from the intertidal zone to depths of 8,500 metres (29,000 feet) or more. exclusively marine. They are mainly marine, but few are fresh water forms. PLAY. They have spicules with a hexagon shape. Based on the embryological studies, sponges are proved as animals and are classified into a separate Phylum in the animals. Gravity. None. Aceolomate. They provide support the sponge’s structure. The body is cylindrical in shape and exhibit radial symmetry. The body is round or oval with twisted root tufts. The body comprises numerous pores known as Ostia and osculum. Water flows in from pores … They can be found at a depth of more than 8000 metres. Sponges are lowly organised less evolved animals. These are pore-bearing multicellular animals. Sponges do not have a system with organs. The body organization is asconoid, syconoid, or leuconoid. The adult body wall contains two layers, outer dermal … Poriferans are pore-bearing first multicellular animals. The sponge is a simple tube of cells. Pinacoderm: It ¡s the outer layer. examples: Sycon (crown sponge), Grantia, Leucosolenia, Clathrina Class 2 : Hexactinellida. Sponges, the members of the phylum Porifera , are a basal Metazoa (animal) clade as a sister of the Diploblasts. Porifera (L., porus = pore; forre = to bear) Also called: Republic of Cells. body shape cylindrical and vase-like. Poriferans are attached to the seafloor and cannot move from one place to the other. The body wall consists of a thin dermis provided with pores called Ostia. Filtering captures particles such as bacteria and algae. [Click on the thumbnail image for a full-sized image]. The name of this phylum is derived from the pores on the body of the sponges, and it means pore bearer in Greek. This finding has many implications for the evolutionary interpretation of early animal traits and sponge development. Porifera are 'pore bearing' organisms, commonly known as sponges, that come in all shapes, sizes, and colors. Water flows in from pores in the tube. Phylum Porifera (Sponges) Etymology:- From the Latin porus for pore, and Ferre to bear. Amoebocytes digest these particles. The body is asymmetrical and cylindrical in shape. This means that they have many cells. Phylum Porifera Nervous tissue. By and large, sponges are marine animals. Th… However, based on recent phylogenomic analyses, we suggest that the phylum Porifera could well be monophyletic, in accordance with cladistic analyses based on morphology. Instead respiration occurs directly between cells and their environment. The skeleton consists of siliceous spicules fused at the tips forming a three-dimensional network with parietal gaps. As a result, sponges do not have digestive, respiratory, or nervous systems. Cells absorb the oxygen through diffusion. These are by far the simplest multicellular animals. Characteristics of Phylum Porifera. Animals –Animal Phyla: Porifera; Ziser Lecture Notes, 2015.9 1 Phylum Porifera (Sponges) ~9,000 living species; >2200 fossil forms abundant fossil record eg. Sponges are classified in the phylum Porifera. The bodies of animals are made up of differentiated tissues to perform an equally specialized task, sometimes in to or three levels of differentiation (excluding sponges). grow up … Your email address will not be published. 1. newly discovered(2010) fossils that may be sponges have The skeleton resembles glass. They depict cellular grade of organization. Grade of organization: cellular grade of body Shape: Body shape is variable, mostly cylinder shaped Symmetry: Asymmetrical or radially symmetrical. Since they share this characteristic with plants, they are often confused to be plants instead of animals. From there, the sperm cells are released into the sea through the osculum. Based on the embryological studies, sponges are proved as animals and are classified into a separate Phylum in the animals. Sponges are multicellular. These animals are multicellular. Digestion and Excretion: The sponge’s body cavity functions like a digestive system. The body is cylindrical and exhibits radial symmetry.
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