'Medusa stage' diaporamas de présentation

INVERTEBRATES About 97 percent of all animals are invertebrates.

INVERTEBRATES About 97 percent of all animals are invertebrates. Animals are characteristically multicellular heterotrophs whose cells lack cell walls Animals likely evolved from protozoans. Kingdom Protista.

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Chapter: Invertebrate Animals

Table of Contents. Chapter: Invertebrate Animals. Section 1: What is an animal?. Section 2: Sponges, Cnidarians, Flatworms, and Roundworms. Section 3: Mollusks and Segmented Worms. Section 4: Arthropods and Echinoderms. What is an animal?. 1. Animal Characteristics.

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Chapter: Invertebrate Animals

Table of Contents. Chapter: Invertebrate Animals. Section 1: What is an animal?. Section 2: Sponges, Cnidarians, Flatworms, and Roundworms. Section 3: Mollusks and Segmented Worms. Section 4: Arthropods and Echinoderms. What is an animal?. 1. Animal Characteristics.

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Phylum Cnidaria stinging-celled animals

Phylum Cnidaria stinging-celled animals. Jellyfishes, corals, anemones Radial symmetry Two tissue layers with inner mesoglea Primitive nerve net but no brain 2-way digestive tract Stinging cells for capturing food. Introduction to Cnidaria .

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Coral Bleaching and Coral Diseases: An Overview

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Cnidarians

Cnidarians Jellyfish, corals, hydra and anemone Defining Characteristics Radial Symmetry Tentacles with nematocysts (stinging cells) No cephalization (no head) Two stages: polyp and medusa Endoderm and ectoderm Radial Symmetry

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3 Classes of Cnidarians

3 Classes of Cnidarians. 3 Classes of Cnidarians. Cnidarians are sac-like animals that have radial symmetry, tentacles armed with stinging cells, two tissue layers, and no organs. Presently, they are grouped into three classes: Hydrozoa Scyphozoa Anthozoa. CLASS HYDROZOA.

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Phylum Cnidaria or Coelenterata

Phylum Cnidaria or Coelenterata. Jellyfish, anemones, corals. The Basics. Two tissue layers - an outer epidermis and an inner gastroderm Nerve net with stinging capsules called nematocysts Radial symmetry with 2 body types - a polyp and/or medusa.

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Cnidarians Part Deux

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CH 27 Phylum Cnidaria

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Phylum Cnidaria

Phylum Cnidaria. Cnidarians Include Hydras, jellyfish, sea anemones & corals Radially symmetrical Acoelomate Two basic forms: Polyp : Cylindrical form which attach bases to substratum Medusa : Flattened, mouth down version of the polyp. Moves freely. Forms of Cnidarians. Body Plan.

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Phylum Cnidaria

Phylum Cnidaria. Cnidarians Include Hydras, jellyfish, sea anemones & corals Radially symmetrical Acoelomate Two basic forms: Polyp : Cylindrical form which attach bases to substratum Medusa : Flattened, mouth down version of the polyp. Moves freely. Forms of Cnidarians. Body Plan.

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Cnidarians

Cnidarians. Classes of Cnidarians. 1) Class: Anthozoa CORALS, SEA ANEMONES 2) Class: Hydrozoa HYDROIDS, SIPHONOPHORES--Portugese Man-of-War 3) Class: Schyphozoa JELLYFISH. Anthozoans. Anthozoans only exist in the polyp stage. Here are two types of this class: Corals

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Phylum Cnidaria, Class Anthozoa

Phylum Cnidaria, Class Anthozoa. The Anthozoans (class Anthozoa) include the corals, sea anemones, and sea fans Anthozoans lack a medusa stage and exist as solitary or colonial polyps

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