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