Although the majority of sponges are marine, some species live in freshwater lakes and streams. Phylum coelenterata characteristics and classification. Arthropods include the insects, arachnids, crustaceans, and others. Porifera characteristics characteristics of phylum porifera. Some of the important characteristics of phylum porifera are mentioned below. 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 includes simple metazoan animals which are known as sponges. Leucosolenia exhibit cellular level of construction without tissues 1 st multicellilars acoelomate. Sponges are the simplest of the multicellular phyla. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Poriferans are diploblastic animals, they show outer pinacoderm, dermal layer, inner choanoderm gastral layer and in between them. Characteristics of phylum cnidaria biology for majors ii.
These are primitive multicellular animals and have cellular level of organisation. Collar cells exist in other phlya but they are not flagellated. Atkinson lj and sink kj eds field guide to the ofshore marine invertebrates of south africa. However, local taxonomic knowledge of this phylum is largely incomplete. General characteristic features of phylum porifera.
Invertebrate phyla characteristics phylum porifera sponges means pore bearing no true tissues or organs most primitive of the multicellular animals adults are sessile adults typically asymmetrical have some regeneration capabilities flagellated cells choanocytes drive water through canals and. Comparison of the major animal phyla common namecommon name phylum spongesspongessponges porifera hydra, anemones, jellyfishhydra, anemones, jellyfish cnidaria flatwormsflatworms platyhelminthes roundwormsroundworms nematoda segmented wormsegmented worms sss annelida. Your purchase includes a 7page student fillin style notes sheet and 7page teacher key in both. It is because of this parasitic nature that they do cause some amount of trouble for the host animal. Water enters through minute pores called ostia in the body wall into a central cavity,spongocoel, from where it goes out through the osculum. Their relationship to other phyla is obscure as it is not. Phylum cnidaria general characteristics hillary wilson. Platyhelminthes very commonly known as flatworms or tapeworms, these animals are softbodied invertebrate animals. Phylum cnidaria includes animals that show radial or biradial symmetry and are diploblastic, that is, they develop from two embryonic layers. Biology, comparison of the major animal phyla, chart. Even though they are multicellular, they do not have any tissues or organs.
This pathway of water is helpful for respiration, food gathering and removal of waste. Learn to recognized the phylum porifera from other animals. The phylum porifera sponges notes bundle covers the following topics and more. They all are marine, shallow and coastal water species. Choanocyte flagellated collar cell the flagellated collar cell. An introduction to the biology, classification and ecology of sponges, the phylum porifera. Wikipedia this group of animals is probably considered as the oldest animal group. The adult body wall contains two layers, outer dermal layer and inner gastral layer. They are generally marine and mostly asymmetrical animals figure 4. Body shape is variable, mostly cylinder shaped symmetry. Sponges are sessile, sedentary and marine except for family. Phylum porifera is classified into three classes on the basis of skeleton or spicules they possess. The organic skeleton is composed of an extremely variable amount of collagenous material, which is structured as a network of spongin fibers or dispersed in the intercellular matrix.
Atkinson lj and sink kj eds field guide to the ofshore marine invertebrates of south africa, malachite marketing and. A few of these live as parasites on humans and other animals. The principal features of phylum porifera are listed below so you can refer to this background information throughout the lab. They are found in shallow ocean environments to depths as great as five kilometers km. Spongin in the form of fibrils and fibers is an apomorphic trait of the phylum porifera. Porifera cellular level of body organization middle layer mesohyl. Parazoans beside animals do not display tissuelevel organization, although they do have specialized cells that perform specific functions. Pdf the porifera are a wellcharacterised group of aquatic, predominantly marine animals including about 5000 described species. Cnidarians contain specialized cells known as cnidocytes stinging cells containing organelles called nematocysts stingers. Water enters through minute pores ostia in the body wall into. Also, the skeleton of gemmules is made of spongin armed by siliceous. Pdf freshwater sponges, at present considered monophyletic, belong to the suborder. These are by far the simplest multicellular animals. Cnidaria authors kerry sink1, mark gibbons2, megan laird3, and lara atkinson4 citation sink kj, gibbons mj, laird mc and atkinson lj.
Aquiferous system and high totipotent nature of the cells are the two characteristic features of sponges. Characteristics of phylum porifera sponges have a variety of shapes. Nearly all about 99 percent cnidarians are marine species. Most of them are marine while a few are fresh water forms. They are mainly marine, but few are fresh water forms. Identifying characteristics of the members of phylum porifera noncoelomates therefore do not possess any true body systems although they do have highly. They are known as acellular or noncellular organism.
Sponges are simple invertebrate animals that live in aquatic habitats. Porifera authors touiek samaai 1, robyn payne2, seshnee maduray, and liesl janson citation samaai t, payne rp, maduray s and janson l. Characteristics of phylum porifera sponges phylum porifera is included in sub kingdom parazoa introduction. A protozoan body consists of only mass of protoplasm, so they are called acellular or noncellular animals. The simplest of all the invertebrates are the parazoans, which include only the phylum porifera.
The adult body wall contains two layers, outer dermal. Ed phylum porifera characteristics flashcards quizlet. The word arthropoda comes from two greek words arthron and podos, where arthron means joint, and podos means foot, which together mean jointed feet. They vary in size from less than a centimeter to a mass that can fill your arm. Body is vase shaped and comparatively simple in structure. They are found in places like marine water, freshwater, and damp soil.
Chapter 8 phylum porifera to protect the rights of the authors and publisher we inform you that this pdf is an uncorrected proof for internal business use only by the authors, editors. Meaning of phylum name classification sponge diversity body structure filter feeding. Phylum porifera characteristics, types, functions and. Characteristics of phylum porifera flashcards quizlet. Skeleton consists of calcareous spicules made up of carbonate of lime. They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them, consisting of jellylike mesohyl sandwiched between two thin layers of cells. The approximately 5,000 living sponge species are classified in the phylum porifera, which is composed of three distinct groups, the hexactinellida glass sponges, the demospongia, and the calcarea calcareous sponges. The mouth is surrounded by short and thin tentacles.
Body is cylindrical, asymmetrical or has radial symmetry. The described scheme of classification of the phylum porifera follows scheme by parker and haswell 1964 and edited by marshall and williams 1974. Bodies completely covered with bony armor plates 4. These cells are present around the mouth and tentacles, and. These are multicellular organisms which are sessilesedentary in nature.
While some sponges are radially symmetrical, the majority of. Definition of porifera a group of metazoan animal whose bodies are without any symmetry or radially symmetrical, without mouth and nervous system and whose bodies are provided with many pores. These wormlike organisms lack digestive, respiratory, nervous, and excretory systems. There is some debate if sponges are complex colonial protozans and not metazoans. Porifera the sponges phylum multiple choice test key sheri amsel. Characteristics of earliestcharacteristics of vertebrates craniates 1. Phylum annelida contains earthworms and wormlike creatures that have segmented bodies. The invertebrates, or invertebrata, are animals that do not contain bony structures, such as the cranium and vertebrae. There are following characteristics of the phylum porifera.
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