Animal Kingdom: Sponges, Cnidarians, Flatworms, Roundworms, Segmented Worms
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The document discusses several invertebrate animal phyla, including sponges, cnidarians, flatworms, roundworms, and segmented worms. Sponges are the simplest animals and have a skeleton made of spicules to support their body. Cnidarians like hydra, jellyfish, and corals have stinging cells called nematocysts that they use for defense and capturing prey. Flatworms are flat ribbon-like organisms including parasitic tapeworms and free-living planaria. Roundworms have long cylindrical bodies and include parasites like the trichina worm as well as soil decomposers. Segmented worms have a segmented body and include earthworms, leeches, and
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Animal Kingdom: Sponges, Cnidarians, Flatworms, Roundworms, Segmented Worms
- 1. Animal Kingdom SPONGES, CNIDARIANS, WORMS
- 2. Review • What you know about animal cells? • How do animals differ in size, shape or habitat? • How do they respond to their environment?
- 3. Characteristics • Multicellular • Eukaryotic • Have no cell walls • Have cells that transmit messages.
- 4. Q42. In you observation, how are animals distinguished from the other groups as to their reaction to stimuli?
- 5. 2 Big Groups of Animals 1. Invertebrates – without backbones 2. Vertebrates – with backbones
- 7. SPONGES - - Simplest animals Live in shallow and deep ocean Young sponges are motile, adults are attached to rocks belong to Phylum Porifera
- 8. SPONGES - Body is supported by a “skeleton” called spicules. - used for bathing and washing.
- 9. SPONGES - Waste water and materials go out of the sponges through the osculum.
- 12. CNIDARIANS - belong to Phylum Cnidaria Tentacles contain stinging ceslls called nematocysts. hydra jellyfish corals
- 13. CNIDARIANS - These poison-filled structures are used for defense and to capture their prey.
- 14. CNIDARIANS (Examples) hydra Hydra represents freshwater cnidarians
- 16. CNIDARIANS (Examples) corals Corals form colonies and secrete hard skeleton
- 17. CNIDARIANS (Examples) Corals form colonies and secrete hard skeleton. These accumulate to form coral reefs. Coral reef is where fishes and other marine organisms breed.
- 18. FLATWORMS - - belong to Phylum Platyhelminthes Flat and ribbon-like organisms Found in freshwater, in wet places and marine waters.
- 20. FLATWORMS (Examples) Planaria is an example of a free-living flatworm. It lives in moist surfaces, under rocks in ponds, rivers and even aquariums.
- 21. FLATWORMS (Examples) Tapeworms are also parasitic flatworms like flukes without a digestive system.
- 22. ROUNDWORMS - belong to Phylum Nematoda Also known as nematodes Have long cylindrical and slender bodies ascaris
- 23. ROUNDWORMS - Decomposers in soil in both marine and freshwaters. Other examples include heartworm, trichina worm, hookworm, pinworm
- 24. SEGMENTED WORMS - belong to Phylum Annelida Also known as annelids Characterized by a segmented or repeated body parts. Ex. Earthworms, polychaetes, leeches
- 25. SEGMENTED WORMS - Annelids have nervous, circulatory, digestive and excretory systems. - Gas exchange only occurs through diffusion.
- 27. Polychaetes - Most polychaetes are marine living in tubes attached to rocks or sand. - They get floating food through their feathery gills. Example: sandworms
- 28. Leeches - - Are blood-sucking annelids. They have suckers that are also attach themselves to their hosts. They secrete an ati-clotting chemical that has been used in medicine.