1 / 16

Echinoderms and Chordates

Echinoderms and Chordates. Echinodermata. Chordates. True vertebrates and animals with notochords. Sea Star Brittle Star Sea Urchin Sand Dollar Sea Cucumber Crinoid. Examples. Echinodermata. Chordates. Bilateral . Radial . Symmetry. Echinodermata. Chordates. Eumetazoa. Eumetazoa.

nevin
Download Presentation

Echinoderms and Chordates

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. Echinoderms and Chordates

  2. Echinodermata Chordates True vertebrates and animals with notochords • Sea Star • Brittle Star • Sea Urchin • Sand Dollar • Sea Cucumber • Crinoid Examples

  3. Echinodermata Chordates Bilateral • Radial Symmetry

  4. Echinodermata Chordates Eumetazoa • Eumetazoa Tissues are organized into germ layers Three germ layers Three germ layers Tissue Complexity

  5. Echinodermata Chordates 2 Yes • 2 • Yes Gut Openings and Coelom

  6. Echinodermata Chordates Deuterostome • Deuterotsome The first opening, or blasospore, develops into the anus Embryonic Development

  7. Echinodermata Chordates Complete digestive tract • Simple, but complete, digestive tract FUN FACT: Sea stars can push their stomachs outside their bodies to digest an organism that would not fit in its mouth externally. Feeding and Digestion

  8. Echinodermata Chordates Gills or lungs • Simple gills Respiration

  9. Echinodermata Chordates Closed • Water Vascular Circulation

  10. Echinodermata Chordates Kidneys • Diffusion Excretion

  11. Echinodermata Chordates Specialized brain • Nerve ring • No brain Response

  12. Echinodermata Chordates Endoskeleton and muscular system • Expand and contract their tube feet to “walk” Movement

  13. Echinodermata Chordates Sexual Reproduction Fertilization occurs internally in terrestrial species and externally in aquatic organism • Both sexual and asexual • Distinct males and females • Sperm and egg are released into the water – external fertilization • Can divide and grow a new organism FUN FACT: Like this sea star larvae, echinoderms display bilateral symmetry until they reach maturity Reproduction and Fertilization

  14. How is the group similar to other life? How is the group different from other life? Water vascular system System of nerves but no brain Only found in salt water • Reproduction • Sexual or asexual • Energy Utilization • Heterotrophs, able to ‘hunt’ • Homeostasis • Simple gills for respiration • Respond to Environmental Stimuli • Able to move and hunt • Growth and Development • Bilateral symmetry to radial Big Idea #1

  15. Heterotrophic (Filter feeders, hunters) • Tube feet (part of water vascular system) allow some echinoderms to move and hunt • External Digestion • Dermal Branchiaeallow organism to absorb oxygen from the environment Big Idea #2Gathering and Utilizing Energy Efficiently

  16. Most are benthic – live on the sea floor • Hunted by crabs, sharks, and sea birds • Defense mechanisms include spines, toxins, discharge of sticky entangling threads • Keystone species: Starfish and mussels • Ossified skeletons are a major part of limestone formation Big Idea #4Interaction with Environment and Ecosysyem

More Related