Porifera authors touiek samaai 1, robyn payne2, seshnee maduray, and liesl janson citation samaai t, payne rp, maduray s and janson l. The word echinoderm means spiny skin echino spiny, derm skin which is fitting. Inside their clade, each phylum is clearly distinguished by its general features. The primitive structure of the porifera indicates affinities with certain types of protozoan colonies. Their relationship to other phyla is obscure as it is not. Porifera have no real body layers but they do have 2 cell layers. They also may play a role in defense against predators and these determine the class the sponge is in.
As esponjas filo porifera sao um dos metazoarios mais antigos existentes, mas. Atkinson lj and sink kj eds field guide to the ofshore marine invertebrates of south. Proposal for a revised classification of the demospongiae porifera. Sponges phylum porifera are important organisms from an ecological. How does the name porifera relate to the structure of a sponge. The world of sponges is a bit more vast than you might be aware of. Atkinson lj and sink kj eds field guide to the ofshore marine invertebrates of south africa. Porifera, cnidaria, and worms, is a 46 slide power point presentation, 5 pages of students notes, 3 formative assessments and one quiz. They are one of the most primitive multicellular aquatic animals. Animals included in phylum porifera are parazoans because they do not show the formation of true tissues except in class hexactinellida. Mollusca is the second largest phylum of invertebrate animals. That said, the emphasis of these practice questions falls on phylum porifera.
Choose from 500 different sets of porifera flashcards on quizlet. These wormlike organisms lack digestive, respiratory, nervous, and excretory systems. Some of the important general characters of phylum cnidaria are listed below. Spongin in the form of fibrils and fibers is an apomorphic trait of the phylum porifera.
Pdf the porifera are a wellcharacterised group of aquatic, predominantly marine animals including about 5000 described species. Water is drawn into the internal cavities through pores, food particles are taken out and the water flows out through a large pore osculum. Published online in final form pdf on january 14, 2015. Sponges have multiple cell types that are geared toward executing various metabolic functions. Phylum echinodermata the phylum echinodermata is made up of the most advanced invertebrates and includes organisms such as the starfish, sea urchins and sea cucumbers. 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. It is widely considered that poriferans arose from flagellated protozoans.
Nearly every type of water body is populated by sponges. All are aquatic and are mostly marine, except a few like hydra, are fresh water. Learn exam 1 lab practical biology 2 porifera cnidaria with free interactive flashcards. Although the majority of sponges are marine, some species live in freshwater lakes and streams. Because of their simple design these creatures have been able to adapt to a variety of habitats and conditions. Phylum chordata characteristics online biology notes. Porifera cellular level of body organization middle layer mesohyl. Dipartimeto per lo studio del territorio e delle sue risorse, university penthouse usa april 2012 bd pdf of genoa, italy. They are found in shallow ocean environments to depths as great as five kilometers km. Collar cells with cytoplasm covered flagella that help to provide waters flow. The following taxa of this phylum occur in the region. Familiar as sponges, these animals are wellknown for their ability to absorb and withhold fluids.
Porifera have specialized cells called choanocytes collar cells. These organisms show very simple organization, with a rudimentary endoskeleton. Sea sponges have no symmetry or cephylization and have no organs. From porifera to chordata, animals have come a long way. Mostly marine animals, the cnidarians include the corals, hydras, jellyfish, portuguese menofwar, sea. There are approximately 9,000 known species of porifera of which. 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. This editable presentation is designed to help you teach the topic of.
Cnidaria authors kerry sink1, mark gibbons2, megan laird3, and lara atkinson4 citation sink kj, gibbons mj, laird mc and atkinson lj. Surprising was the fact that even those elements exist in porifera pdf realty elk grove which are characteristic for. Asal usul hewan porifera mengisyaratkan hewan ini porifera mencari makan dengan cara heterotrof. Porifera have a cellular, rather than tissular, level of organization, without any true nervous or. Porifera are a phylum of sessile permanently affixed and mostly marine invertebrate animals. 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. We will discuss their key features, body structure, their filtration mechanism, and why they. Sea sponges are multicellular, but not all of the cells its made of work together, instead, they each have a job to keep the sponge alive and reproducing. The gnathostomata are further divided into six classes. Atkinson lj and sink kj eds field guide to the ofshore marine invertebrates of south africa, malachite marketing and media, pretoria, pp. Cnidarian, also called coelenterate, any member of the phylum cnidaria coelenterata, a group made up of more than 9,000 living species. Feb 15, 20 watch the full video and learn all about kingdom animalia.
Are softbodied carnivorous animal with stinging tentacles arranged in circles around their mouths. In this article we will discuss about the general characters and classification of phylum cnidaria. These are internal buds and are response to the hostile environment. Phylum porifera and cnidaria animal biology 110 with raines. Sep 16, 2016 habitat of sea sponges with 15,000 species in waters around the world, sponges phylum porifera are a widespread, extremely primitive animal species. Porifera, cnidaria, and ctenophora are the most primitive clade of metazoans. In this lesson, we will explore the phylum porifera and look at the organisms that make up the group. Sponges constitute the phylum porifera, and have been defined as sessile metazoans multicelled immobile animals that have water intake and outlet openings connected by chambers lined with choanocytes, cells with whiplike flagella.
They distinguish themselves from the other metazoans by their lack of bilateral symmetry. Phylum porifera and cnidaria animal biology 110 with. Sessile, benthic filter feeders competitors for space fed upon by specialist predators grow in many forms, solitary, colonial, branching, as thin sheets over substrates from few cm to over 1 m in size. Sponges are simple invertebrate animals that live in aquatic habitats. However, a few carnivorous sponges have lost these water flow systems and the choanocytes. Porifera, cnidaria, ctenophora, calcarea, demospongiae. Department of zoology at andczoology museummuseum specimens. Gemmules are asexual reproductive bodies of most of the freshwater and a few marine sponges. Phylum porifera and cnidaria animal biology 110 with raines at colorado state university fort collins studyblue flashcards. Choose from 500 different sets of exam 1 lab practical biology 2 porifera cnidaria flashcards on quizlet.
Hydra, jellyfish, sea anemones, corals, obelia, portuguesemanofwar from greek knid meaning sea nettle a plant with stinging hairs these organisms. Also, the skeleton of gemmules is made of spongin armed by siliceous. Chondrichthyes, osteichthyes, amphibia, reptilia, aves and mammalia. Study 47 phylum porifera and cnidaria flashcards from linea l. A phylum of simple multicellular animals, with a simple body enclosing a single central cavity or penetrated by numerous interconnected cavities. Around 85,000 extant species of molluscs are recognized.