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1. Wonders Of The Seas
Keep checking back for new lessons! Lesson 1 Sponges. Lesson 2 Cnidarians. Lesson 3 Mollusks. Lesson 4 Echinoderms. Lesson 5 Arthropods

2. Sponges
Encrusting sponges are similar to moss because they tend to cover the surfaces of rocks.

3. PH@School Science Explorer Animals Student Table Of Contents
Chapter 1 Sponges, Cnidarians, and Worms Chapter 2 Mollusks, Arthropods, and Echinoderms Chapter 3 Fishes, Amphibians, and Reptiles

4. Cnidarians
These nitoblasts have hair triggers with a powerful neurotoxin. Cnidarians have both sexual and asexual reproduction cycles.

5. Sponges, Cnidarians, Flatworms, Roundworms
Sponges, Cnidarians, Flatworms, Roundworms

6. Animals
Animals Topics include Sponges and Cnidarians. Worms (flat, round and segmented) Mollusks. Arthropods (Crustaceans, Arachnids and Insects)

7. Fossil May Be Ancestor Of Most Animals - Science Mysteries -
In contrast, many sponges and cnidarians such as corals have "radial symmetry " which means that cutting the shape in half in any

8. Sponges Cnidarians
Sponges. Kingdom Animalia Phylum Porifera Cnidarians have two body forms. Polyp stationary, vase-shaped. Examples hydra, coral, sea

9. Sponges Cnidarian Notes B1
Sponges, Cnidarians, Ctenophores Phylum Porifera Characteristics Includes marine freshwater sponges

10. Quia - Chapter 1-Sponges, Cnidarians, Worms And Mollusks
Quiz Chapter 1Sponges, Cnidarians, Worms and Mollusks. From the Prentice Hall Book, C, "Parade of Life Animals" Tools

11. Mr And Mrs Smiths Life Science Invertebrate Animals Sponges
Section 4.1 4.2 sponges, cnidarians worms wormhole.gif (3746 bytes) Last Updated 4/132005 4/10/2005 4/4/2005 3/31/2005 3/29/2005 3/27/2005 3/26/2005

12. Mr And Mrs Smith's Life Science Days 41-45
Days 4145 Unit 9 sponges, cnidarians, worms. Last Updated 8/29/2004 11/23/2002 Topic 9-3 and 9-4 Round and Segmented worms
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Days 41-45 Unit 9 Sponges, Cnidarians, Worms.
Last Updated 8/29/2004 11/23/2002 Day 41
9-1 What are sponges?
9-2 What are cnidarians? Objective
1. Identify the body forms of cnidarians and classify cnidarians as a medusa or a polyp.
2. Read for information and label a diagram.
3. Name three cnidarians.
4. Explain why cnidarians are considered more complex than spongesbecause their cells are
organized into tissues. 5. Explain how cnidocytes get food. 6. Identify the two cell layers of cnidarians. Classwork 1. Hand Back Invertebrate Evaluation Sponge information flagellum: long whiplike structure pores: tiny openings spicules: needlelike structures in the jellylike layer 3. Filmstrip: Cnidarians 4. Use the Sponge Information Diagram to complete the sponge diagrams. Sponge Cross Section Diagram Sponge External Diagram 5. Draw a medusa and a polyp.

13. Sponges, Cnidarians, Flatworms, Roundworms
Embryonic Germ Layers. sponges. asymmetrical. no gut. none. cnidarians. radial. saclike Elephantiasis is a human disease caused by filaria worms. 102/Bio 102
The Biology Web (Home) General Biology 1 General Biology 2 Human Biology
Chapter 30 - Introduction to Animals
Sponges, Cnidarians, Flatworms, Roundworms
Characteristics of Animals
Animals are multicellular
Except for sponges, animal cells are arranged into tissues . Tissues are necessary to produce organs and organ systems Tissues, organs, and organ systems enabled the evolution of large, multicellular bodies.
Animal cells lack cell walls
A skeleton supports the tissues of large animals. The cells are held together by protein structures called junctions that extend from one cell to another. An abundance of extracellular proteins also support the cells.
Animals have a period of embryonic development
During embryonic development , cells become specialized and tissues form. The growth of tissues, organs, and organ systems therefore requires a period of embryonic development.
Animals are heterotrophs
Heterotrophs consume their organic food. Except for sponges, they ingest food and digest it in a central cavity.
Animals are motile
Heterotrophy often requires motility to capture prey. Animals have motility during at least some part of their

14. Chapter 29: Sponges, Cnidarians, Flatworms, And Roundworms - Weblinks - Biology:
Chapter 29 sponges, cnidarians, Flatworms, and Roundworms Flatworms are the least complex worms. Read the information at this site to learn more about
Print this Web Links Activity Log to record your findings. In order to view and print these activities, it is necessary to have Adobe Acrobat Reader. If you do not have this, get the free download now.
Click the Techie Toolbox for tips and help to make the most of your time on the Web. Chapter 29: Sponges, Cnidarians, Flatworms, and Roundworms Aquatic Resources Division, The Marine Resources Center, Marine Biological Laboratory, Woods Hole, MA
Visit this site to view photographs and for taxonomic information on sponges. What is the scientific name for the organ-pipe sponge? Wonders of the Seas: Cnidarians: Simple but Deadly Animals!
What are the two different forms of a Cnidarian body? What is a nematocyst? What is a Scyphozoan? Follow the link above to answer these questions about cnidaria. Flatworms
Flatworms are the least complex worms. Read the information at this site to learn more about flatworm habitats, how they move, reproduction, and how and what they eat. Unit 1
Unit 2

Unit 3

Unit 4

15. Lecture 13
Simple sponges, cnidarians, and flat worms are examples of acoelomate animals. A few phyla, like the nemotodes, possess a coelom that is not considered
October 28, 2004 Powerpoint Set #9 Animal Diversity Next, we will make a brief survey of the major animal phyla. Of the 30 distinct phyla, most animals fall within one of 9 different groups. We will discuss these beginning with the simplest animals, the sponges, and finish with the phyla that we and the other vertebrates are members of, the Chordata. 1. Porifera The earliest known animals are thought to have evolved from colonies of single-celled protests. Living sponges, members of the phylum Porifera, are probably similar to these earliest animals. Sponges sessile animals formed by a rather loose association of cells and are filter feeders. Flagellated cells known as choanocytes, or collar cells, draw water into the middle of the animal through small hole, or pores. Water is then released from the animal through an excurrent siphon. Small particles, such as algae or bacteria, are drawn into the animal by the water currents and the spongeÌs cells engulf, or eat, the particles through a process of phagocytosis. Phagocytosis ("cell eating") is a process where particles are literally engulfed by the plasma membrane of the cell. This is essentially the same process through which macrophages and other cells of our immune system remove invading particles like bacteria. Sponges are relatively simple in their organization. They are mostly asymmetrical or radially symmetrical and lack a true nervous system or muscles. Although they do possess specialized cell types, there are not organized into a functioning tissue. Because they are lacking in a tissue-level of organization, sponges obviously are acoelomate and do not possess any type of organized digestive system.

16. Introduction To Animal Notes B1
Includes sponges, cnidarians, flatworms, roundworms, annelids (segmented worms), sponges have specialized nerve cells, while cnidarians flatworms have
Introduction to Animals
  • All multicellular metazoans eukaryotic Cells lack cell walls variety of shapes Ingestive heterotrophs Store food reserves temporarily as glycogen in the liver Have some type of skeletal support Exoskeletons found in arthropods cover the outside of the body but limit size Endoskeletons found in all vertebrates Worms have fluid-filled internal cavities giving them skeletal support Sponges have the simplest skeleton May be sessile motile (able to move around) Muscular tissue provides energy for movement Reproduce sexually Show l evels of organization including Most show division of labor among cells Cells are specialized for particular functions Cell junctions hold individual cells in a tissue together Most vertebrates have a backbone or spine made of repeating bones called vertebrae that protect the spinal cord Some show cephalization (have a head with sensory organs concentrated there)
Invertebrate Groups
  • Simplest animals Contains the greatest number of animal species Most found in water Do not have an backbone Includes
Vertebrate Groups
  • More complex animals Most have a backbone Includes
Body Areas
  • Dorsal is the back or upper surface Ventral is the belly or lower surface Anterior head or front end Posterior is the tail or hind end opposite the head Oral surface in echinoderms is where the mouth is located ( underside Aboral surface in echinoderms is the surface opposite the mouth top side

17. The Invertebrate Animals
sponges (Phylum Porifera); cnidarians (Phylum Cnidaria); Bilaterians Lophotrochozoans and Ecdysozoans, Echinoderms, Acorn worms, and Chordates
The Invertebrate Animals
Index to this page
The Origin and Evolution of Animals (Metazoa)
  • We do not yet know from what group(s?) of eukaryotes the animals evolved.
  • It occurred in Precambrian times.
  • Before the Cambrian was far along, most of the animal phyla had appeared.
  • So each of the phyla described in this section has had a long, independent history.
  • Our best guesses are shown in the figure (cladogram) on the right.
Sponges ( Phylum Porifera
Sponges are
  • sessile, spending their lives anchored to a solid surface underwater.
  • Most are marine although some live in fresh water.
  • diploblastic ; that is, the body wall is made of two layers of cells with a jellylike mesoglea between them;
  • The body wall is perforated with pores (hence the name Porifera) through which water containing food particles is filtered. The water is drawn in through the pores by collar cells like those found in choanoflagellates
  • dispersed by small, free-swimming larvae;
  • about 10,000 species known

18. Bio 101 LBCC Winter 2005 Ballew, K.
n Includes sponges, cnidarians, mollusks, worms, arthropods, and echinoderms n sponges. n cnidarians. n Segmented worms. n Mollusks. n Arthropods

19. Tree Of Life Topics
years ago and can be grouped into three categories spongelike animals, cnidarians, and worms. The sponges, and cnidarians (corals and sea anemones),
Tree of Life Topics
Archaeocyaths Phylum Chordata
Phylum Chordata comprises those animals most often occupying the top of the food chain, including the fishes, reptiles(included the extinct dinosaurs), reptiles, birds and mammals (including humans). The Chordates primary common feature is a notochord, a rod that extending most of the length of the organism. Lying dorsal to the gut but ventral to the central nervous system, it stiffens the body and acts as support during locomotion. More specifically, the notochordat should be present at least during some part of the organisms development. Other common morphologies include bilateral symmetry, segmented body, a well-developed coelom, a single, dorsal, hollow nerve cord, usually with an enlarged anterior end (i.e., brain), a tail projecting beyond (posterior to) the anus at some stage of development, ventral heart, with dorsal and ventral blood vessels and a closed blood system, a complete digestive system, and usually, a bony or cartilaginous endoskeleton Metazoa The first multi-celled animals ( metazoa ) evolved over 600 million years ago and can be grouped into three categories: sponge-like animals, cnidarians, and worms. The sponges, and cnidarians (corals and sea anemones), are the most primitive with about 11 specialized cell types. Worms and higher metazoa have approximately 55 specialized cells.

20. Odyssey Expeditions Tropical Marine Biology Voyages Marine Biology Field Studies
Invertebrates Classes, characteristics, lifecycles and feeding and of sponges, cnidarians, marine worms, arthropods, and echinoderms.
Odyssey Expeditions Field Studies Voyages Marine Sciece Activities Voyages

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Tropical Marine Biology Curriculum Course Description: The biological and the physical processes interacting with tropical marine organisms including coral reefs, mangroves, and birds, will be introduced and discussed in detail. Particular emphasis will be placed on the integration of ecological processes with the biodiversity and richness of tropical habitats. An introduction to the biology and identification of tropical coral reef organisms will prepare students for underwater research activities to study the ecological processes involved in maintaining high species diversity. A series of evening presentations, discussions and debates will address reef management issues and students will conduct projects to explore areas of interest in more detail. This is a field-oriented course designed to introduce students to the techniques used in the study of biology, ecology, and physiology of subtidal organisms. Current underwater research methods are learned and implemented in underwater exercises.

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