Discuss the phylum porifera

As we learn about the different invertebrate phyla, we will be able to chart some of this history. We will discuss their key features, body structure, their filtration mechanism, and why they. They are multicellular but dont have tissues or organs. As first defined, coelenterates included not only the animals now designated cnidarians but also sponges phylum porifera and comb jellies. Description of sponges structure of sponges canal system of the sponges histological elements constituting the wall of sponges reproduction and development in the.

A list of this type may be arranged alphabetically. These sedentaric animals usually stay in low depths and use solid surface for fixation, but glass sponge reaches at greater depth and anchors on soft sediments. Sponges are characterized by the possession of a feeding system unique among animals. This skin has lots of small pores and a few large openings. In this article we will discuss about the phylum porifera. They are aquatic organisms classified under the phylum porifera with about 15,000 species worldwide. In comparison to other metazoans, the cells of sponge show a much higher degree of independence such that it. All are aquatic and are mostly marine, except a few like hydra, are fresh water.

The small openings are the entrances to a complex system of channels. Some examples for sponges include barrel sponges, boring sponges, basket sponges, bath sponges, etc. The history of life is written on the bodies of the animals that previously inhabited and continue to inhabit earth. Learn vocabulary, terms, and more with flashcards, games, and other study tools. Phylum porifera for neet 2020 in hindi animal kingdom. Phylum porifera zoology questions and answers interview.

Phylum porifera characteristic full explain neet, aiims. Most of them are marine excepting 150 freshwater sponges of the family spongillidae. Phylum porifera, constitute of sponges that are the most primitive of the multicellular animals, lacking organs, but having well developed connective. The body of a sponge is hollow and consists basically of an aggregation of cells between which there is little nervous coordination. Explain the position of the phylum porifera in the. They vary in size from less than a centimeter to a mass that can fill your arm. The name porifera means pore bearer in latin a pore is a tiny hole. This group has been around since the ediacaran period. In fact, the vast number of pores in a sponges body are actually where the phylum derives its name from.

Some of the important general characters of phylum cnidaria are listed below. Porifera authors touiek samaai 1, robyn payne2, seshnee maduray, and liesl janson citation samaai t, payne rp, maduray s and janson l. Phylum porifera mcq multiple choice question and answer phylum porifera mcq with detailed explanation for interview, entrance and competitive exams. Most species are marine and very few live in freshwater. Gemmules are asexual reproductive bodies of most of the freshwater and a few marine sponges. For instance, sponges must be able to control the high volume of water diffusing through them each day and they achieve this through. These are internal buds and are response to the hostile environment. Adults are sessile and have an asymmetrical bodies. Adult sponges are sessile animals that live attached to hard rocky surfaces, shells, or submerged objects.

Hexactinellida or triaxonida or hyalospongiaeglass sponge 3. A sponges body is covered by a skin, one cell thick. Porifera definition is a phylum of primitive invertebrate animals comprising the sponges and having a cellular grade of construction without true tissue or organ formation but with the body permeated by canals and chambers through which a current of water flows and passes in its course through one or more cavities lined with choanocytes. In this lesson, we will explore the phylum porifera and look at the organisms that make up the group.

Phylum porifera class calcarea order clathrinida order leucosoleniida order sycettida order leucettida class hexactinellida class demospongiae order haplosclerida order poecilosclerida class sclerospongiae have you seen the other earthlife web chapters this page was designed and written by mr gordon ramel. The nematocyst consists of capsule, shaft and thread tube fig. There are about 5,000 living species of sponges included in this phylum porifera. These are multicellular organisms which are sessilesedentary in nature. Porifera sponges includes groups like demosponges, calcareous sponges, and hexactinellid sponges. The author has also included the reproduction and development of sponges. Atkinson lj and sink kj eds field guide to the ofshore marine invertebrates of south africa. Atkinson lj and sink kj eds field guide to the ofshore marine invertebrates of south africa, malachite marketing and media, pretoria, pp. By signing up, youll get thousands of stepbystep solutions to your homework questions. Hexactinellida or triaxonida or hyalospongiae glass sponge 3. Describe the organizational features of the simplest multicellular organisms. Phylum porifera zoology questions and answers interview for practice test, quiz and entrance exam questions freely available to download for pdf export.

Only cnidarians manufacture microscopic intracellular stinging capsules, known as nematocysts or cnidae, which give the phylum its name. Hank introduces us to the simplest of the animals, complexitywise. They also may play a role in defense against predators and these determine the class the sponge is in. It is the only phylum of the animal subkingdom parazoa and represents the least evolutionarily advanced group of the animal kingdom. While sponge samples are circulating students will observe their characteristics the ecological uses of the sponge will be examined. Sponge constitute to the phylum of simple invertebrate animals over thousands of species. Familiar as sponges, these animals are wellknown for their ability to absorb and withhold fluids. The principal features of phylum porifera are listed below so you can refer to this background information throughout the lab. There are 9049 species of sponges, in 747 genera and 143 families. Mostly marine animals, the cnidarians include the corals, hydras, jellyfish, portuguese menofwar, sea anemones, sea pens, sea whips, and sea fans. While every effort has been made to provide the most reliable and uptodate information available, ultimate legal requirements with respect to species are contained in. Department of zoology at andczoology museummuseum specimens. There are following characteristics of the phylum porifera. Explain the position of the phylum porifera in the phylogenetic tree of.

On the basis of the chemical nature of spicules types of the skeleton they possess, phylum porifera has been further divided into the following classes. Discuss the phylum porifera and explain that sponges are animals. In this article we will discuss about the general characters and classification of phylum cnidaria. Only sponges phylum porifera have asymmetrical body plans.

These are exclusively marine and mostly live in shallow seawater. The approximately 5,000 living sponge species are classified in the phylum porifera, which is composed of three distinct groups, the hexactinellida glass. Explain the various body forms and bodily functions of sponges. Sponges are the simplest of the multicellular phyla. In this video we will discuss about phylum porifera for neet 2020 in hindi animal kingdom class 11 swarnim biology classes free test seriesmcqs for phylum porifera animal kingdom. The nematocysts are used for defence and offence, iii interstitial cells. Sponges take their name from small holes that cover their bodies. They are generally marine aquatic organisms, with a few freshwater species. Survey of the animal kingdom phyla porifera and cnidaria. Some prominent ones include insects, spiders, ants, bees, crabs, shrimps, millipedes, centipedes etc. 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 phylum porifera includes nearly 8500 described species.

Phylum porifera the shape of life the story of the. Sponges belong to phylum porifera and its name derived from the latin terms porus which is pores and ferre for bear. In some habitats they comprise a major com ponent of the benthic fauna and may play important roles in ecosystem processes. Sponge got its name because of its body full of holes or what we call spores. The word porifera comes from the holes in the spongesit comes from the latin words porus pore and ferre bear, meaning porebearer. The following points highlight the three main classes of phylum porifera. Most of them are marine while a few are fresh water forms. Apr 19, 2015 sponges are aquatic animals with a simple hollow asymmetrical body and categorized under phylum porifera. Sponges, the members of the phylum porifera are a basal metazoa animal clade as a sister of the diploblasts. Difference between sponges and cnidarians compare the. Members of this group include glass sponges, demosponges, and calcareous sponges.

Phylum porifera pori pores, fera bearers are popularly known as sponges. List of animal phyla simple english wikipedia, the free. Phylum porifera, or the sponge, is entirely aquatic, with over 98 percent living in the ocean, and the rest living in freshwater lakes and streams, according to biomedia associates. The best i can do is to offer two different schemes to give you some idea of the problems, either one is satisfactory for secondary schools and beyond that you should consult your teacher or lecturer unless you would become a. Porifera the phylum of marine and freshwater invertebrates that comprise the sponges, which live permanently attached to rocks or other surfaces. The sponge serves an important purpose in filtering bacteria and other contaminants from water, and it forms a significant portion of coral reefs. Download objective type questions of phylum porifera pdf visit our pdf store. Itis taxonomy is based on the latest scientific consensus available, and is provided as a general reference source for interested parties. Ellis established the animal nature of these animals on the basis of. Phylum porifera includes about 7000 identified species. The alternative name, coelenterate, refers to their simple organization around a central body cavity the coelenteron. The phylum has the following distinguishing characteristics. Facts about sponges porifera sponges porifera are a group of animals that includes about 10,000 living species.

The majority of sponges are marine, living in seas and oceans. Phylum ginkogphyta this group of plants survived because of its use by the ancient chinese and japanese, who valued it in temple gardens, used it for bonsai, and as a source of herbal medicine. Traditionally, in botany the term division has been used instead of phylum, although the international code of nomenclature for algae, fungi, and. Sponges are simple invertebrate animals that live in aquatic habitats. Sponges porifera are a group of animals that includes about 10,000 living species. List of animal phyla is a list of the major groups of animals usually classified as a phylum. The holes are pores through which the sponge draws in water for feeding, and expels wastes. The higher classification of the porifera is considerably confused by different experts preferring different schemes. Compare and contrast the phyla porifera and cnidaria by. Phylum porifera objective type questions pdf download. Phylum porifera the shape of life the story of the animal kingdom.

However, it is not a legal authority for statutory or regulatory purposes. Arthropods are jointlegged animals and you must have come across a few of these animals. Scientifically speaking, they all come under the animal kingdom under phylum arthropoda the success of the arthropods can mainly be attributed to the presence of exoskeleton, which. 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. Introduction to phylum porifera lowest multicellular animals or metazoans without true tissues, i. May 29, 2017 general characteristics of phylum porifera previous histoplasma capsulatumhistoplasmosis and types of histoplasmosis, pathogenesis, lab diagnosis, treatment, prevention and control. This article reveals the biology of sponges phylum porifera by studying the morphology, anatomy, histology, and physiology of sponges. The body is cylindrical or vase shaped with bristly outer surface. Some animals start life with one type of body symmetry, but develop a different type as adults.

Name of the phylum cnidaria is due to the presence of these cells. Cnidarian, also called coelenterate, any member of the phylum cnidaria coelenterata, a group made up of more than 9,000 living species. Features used to classify animals boundless biology. All the species of this phylum are grouped into three classes depending mainly on the nature of the skeleton. Yet sponges are common and sometimes abundant in habitants of a broad diversity of freshwater commu nities. While some sponges are radially symmetrical, the majority of. Phylum porifera characteristics, types, functions and.