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)

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

Video: Jellyfish Scene from Nemo

The Hydra is a freshwater cnidarian 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 Video Jellyfish Jellyfish and Cousins