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