Diese Präsentation wurde erfolgreich gemeldet.
Die SlideShare-Präsentation wird heruntergeladen. ×

Invertebrates

Anzeige
Anzeige
Anzeige
Anzeige
Anzeige
Anzeige
Anzeige
Anzeige
Anzeige
Anzeige
Anzeige
Anzeige
Nächste SlideShare
Mollusks and annelids
Mollusks and annelids
Wird geladen in …3
×

Hier ansehen

1 von 5 Anzeige
Anzeige

Weitere Verwandte Inhalte

Anzeige

Ähnlich wie Invertebrates (20)

Invertebrates

  1. 1. Invertebrates I. Sponges (Phylum Porifera) • First animals to exist in multicellular form • Simplest kind of animal • Live in salty water • Have few specialized cells, no tissues or organs • Has 2 layers of cells w/ jelly-like substance in between • Flagella direct currents of water through the pores in the sponge • Reproduce in a special asexual way: one sponge can be cut into 10 pieces, each will become a new sponge • They also reproduce sexually • http://www.youtube.com/watch?v=laJgUrSsO_k
  2. 2. II. Hollow-bodied animals (Phylum Cnidaria) • Bodies are big sacks • Has one opening – food and waste goes in and out • Are radially symmetrical (parts extend from a center like spokes of a wheel) • Jellyfish has tentacles/arms with stingers around the mouth • Corals have a hard covering called the exoskeleton • Sea anemones
  3. 3. III. Worms • Flatworms (Phylum Platyhelminthes) - example : tapeworm - are flat/ribbon-shaped/leaf-like - are parasites, cause diseases - have one digestive-system opening • Roundworms (Phylum Nematoda) - parasites, live in the intestines of animals • Segmented (Phylum, Annelida) - Example : earthworms - Have 100 to 180 ring like segments - Have head, tail, mouth, blood, and a tiny brain - They move by means of muscles - Have closed circulatory systems
  4. 4. IV. Spiny-skinned animals • have thin skins, covered w/ spines • Have tube feet to hold onto rocks and to open food • Examples : starfish, se urchin, sand dollars • Starfish pushes its stomach out, digests the food, and then swallows the stomach V. Mollusks • Tasty food for people, also helpful • Have soft bodies • Most have shell coverings called the mantle (except squids and octopus) • Most live in salt water • Snails move with the use of a muscular foot which releases a trail of slime
  5. 5. VI. Arthropods

×