1 / 23

Introduction to Invertebrates

Introduction to Invertebrates. 5 th Grade. Invertebrates. Animals without backbones can have bilateral symmetry, radial symmetry and no symmetry Are part of the Animal Kingdom like vertebrates. What percent of all animals are invertebrates ? . 97% of all animals are invertebrates.

jaguar
Download Presentation

Introduction to Invertebrates

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Introduction to Invertebrates 5th Grade

  2. Invertebrates • Animals without backbones • can have bilateral symmetry, radial symmetry and no symmetry • Are part of the Animal Kingdom like vertebrates

  3. What percent of all animals are invertebrates? • 97% of all animals are invertebrates

  4. Introduction to Sponges

  5. Did you Know? Sponges are so different from most animals that you know that people used to think that they were plants.

  6. How are sponges like plants? How are they like animals? • Like plants, they stay in one place. • Like animals, they take food into their bodies instead of making it themselves • Like animals, they need oxygen to breathe.

  7. Where do sponges live? • 1) mostly in the ocean (99%) • 2) rivers • 3) lakes

  8. Attach themselves permanently to a solid location under water and do not move around

  9. How many? • Over 5,000 species of sponges!

  10. Belongs to the phylum “porifera” • Porifera = “having pores”

  11. Body Structure: What type of animal symmetry do sponges have? • Usually NO body symmetry • They NEVER have tissues or organs • A sponge looks like something like a hollow bag with a large opening at one end and many tiny pores covering its surface

  12. Sponges • Have no brain or central nervous system • How big are they? • Size: range in height from 1-200 cm and width of 1-150 cm.

  13. Sponge Adaptations • Most sponges have spikes ---Why? • Spikes: • Support its soft body • Keep the sponge upright in the water (since it has no spine to do this) • Are a defense mechanism against predators

  14. Sponge Body Structure • Pores –small holes all over the sponge’s body that are used to allow water in • Collar Cells –have whip-like structures that beat back and forth, helping water move through the sponge and trapping food • Jelly-like Cells surrounding spikes –digest and distribute food, remove wastes, and form sperm or egg cells

  15. Body Structure • Collar Cell: • Pores:

  16. Osculum: an opening in the top of the sponge that allows wastes to exit

  17. Take the Sponge Body Structure Tour! • http://www.phschool.com/atschool/phsciexp/active_art/structure_of_a_sponge/index.html

  18. Obtaining Food • Sponges usually eat tiny single-celled organisms (usually microscopic life forms), as well as organic particles

  19. Sponge Reproduction • Reproduce both asexually and sexually • Asexual reproduction is called “budding” • In budding, small sponges from the sides of an adult sponge • Sexual reproduction • Reproduce sexually, but do NOT have separate sexes (males and females) because sponges have both sperm and egg cells

  20. Sponge Reproduction Cycle

  21. All about Sponges! http://www.youtube.com/watch?v=RmPTM965-1c

More Related