Phylum Porifera Sponges Phylum Cnidaria Jellyfish, corals .....
Don’t forget – sponges are animals and belong to the Animal Kingdom 1. Multicellular 2. No organs or body systems 3 . Cellular digestion (heterotrophic) 4. Asymmetry
Sponges are SESSILE – they do not move They obtain food by FILTER FEEDING
Reproduce sexually (sperm and eggs) Reproduce asexually (regeneration) Skeleton composed of spongin (soft) and spicules (hard)
Sponge Anatomy
Amebocytes - cells within the sponge that move around supplying nutrients and taking away waste
CHOANOCYTES – collar cells · layer of cells with flagella · the movement of the flagella keeps a water current going in the sponge · food vacuoles in the collar cells digest plankton and other small organisms (filter feeder)
Sponge Feeding Video http://www.youtube.com/watch?v=RmPTM965-1c&feature=related
Cnidarians - jellyfish, coral, hydra, sea anemone *Named after the stinging cells found on their tentacles called CNIDOCYTES
Characteristics of Cnidarians · Tentacles · Cnidocytes (stinging cells)
· Nematocysts (barbs) · Gastrovascular cavity (digestion)
Most Cnidarians have radial symmetry
Cnidarians have two body forms: polyp (vase shaped) medusa (cup shaped)
Portuguese Man of War - cnidarian that floats in the water and has long tentacles
The Hydra is a freshwater cnidarian we will study in the lab What kind of symmetry does hydra have? Is it a medusa or a polyp?
Video of hydra at http://www. microscopyu
Hydra Anatomy (printable) WORD BANK Gastrovascular cavity Tentacle Cnidocyte Ectoderm Endoderm Mesoglea Ovary/Teste Bud Nematocyst Mouth Basal Disk
Coral Reefs are made from the skeletons of cnidarians
Multimedia Sponge Images and Videos - http://www.junglewalk.com/video/Sponge-movie.htm Cnidarian Images and Videos - http://www.junglewalk.com/video/Coelantrate-movie.htm General Invertebrate Movies at National Geographic --- really good video on the portuguese man of war (under invertebrates) Hydra Video at http://www.schooltube.com/video/55045/Hydra