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Unformatted text preview: Phylum Cnidaria Phylum Cnidaria
Hydra, jellyfish, coral, & sea anemones Phylum Cnidaria Phylum Cnidaria
Examples? • Sea anemones • Corals • Sea Pen • Sea Fan • Sea Plume • Hydra • Jelly fish • Portuguese Man o’ War • Box Jelly Fish I. Body Structure I. Body Structure
A. Polymorphism = more than one body form 1. Polyp 2. Medusa B. Polyp B. Polyp
• Tube with tentacles around the mouth • Sessile Coral polyp Polyp (sea anemone) Polyp (sea anemone) Mythical Hydra Mythical Hydra Polyp (Hydra) Polyp (Hydra) Perseus slays the Gorgon Medusa Perseus slays the Gorgon Medusa C. Medusa C. Medusa
• • •
Umbrella shape Tentacles around mouth Motile, Freeswimming D. Tentacles D. Tentacles Have • nematocysts (stinging cells) • Coiled thread discharges like a harpoon • Contains neurotoxin • Paralyzes prey Discharged nematocyst Discharged nematocyst Discharged nematocyst II. Level of Organization II. Level of Organization A. Tissue B. No organs III. Symmetry III. Symmetry
Radial Compass jellyfish IV. Habitat IV. Habitat
A. Aquatic 1. Most Marine 2. Few freshwater V. Feeding V. Feeding
A. Carnivores Lion’s mane eats (predators) another jelly B. Process of feeding 1. Tentacles sting prey with nematocysts 2. Tentacles grab prey 3. Prey pulled into mouth Process of feeding Process of feeding 4. Prey stuffed into gastrovascular cavity (GVC)* 5. GVC makes enzymes, extra cellular digestion 6. Undigested food back out mouth
*incomplete digestive tract (no anus) Lion’s mane jellyfish eating Lion’s mane jellyfish eating VI. Respiration VI. Respiration
• Via diffusion • Body is two cell layers thick VII. Internal Transport VII. Internal Transport
Via diffusion VIII. Excretion VIII. Excretion • Via diffusion A. No cephalization or nervous system B. Nerve net around mouth IX. Response IX. Response IX. Response IX. Response
C. Sensory cells 1. Chemoreceptors (chemicals) 2. Thigmoreceptors (touch) 3. Photoreceptors (light) Ocelli (eyespots) 4. Statocysts (balance) X. Locomotion X. Locomotion
A. Medusa motile, freeswimming B. Polyps sessile Exceptions: 1. Hydra tumbles on tentacles 2. Sea anemones glide on pedal disc XI. Reproduction XI. Reproduction
1. Asexual budding from polyps or medusae 2. Sexual a. Medusae release sperm & eggs b. Some monoecious, some dioecious c. Larvae freeswimming XII. Ecological Role XII. Ecological Role
A. Predators and prey B. Neurotoxins in medical research C. Coral – jewelry, building, reefs (surfing!) D. Coral reefs habitat for many great biodiversity protect coastline E. Symbiosis with other organisms Class Anthozoa: Sea Class Anthozoa: Sea Anemones Sea Anemones (with sea urchins) Sea Anemones (with sea urchins) Sea Anemones Clown fish with sea Sea Anemones Clown fish with sea anemone Clown fish & eggs with sea Clown fish & eggs with sea anemone Clown fish with sea anemone Clown fish with sea anemone Giant Sea Anemone Giant Sea Anemone Rosy Sea Anemone Rosy Sea Anemone Class Anthozoa: Corals Class Anthozoa: Corals Brain Coral Brain Coral Coral Coral Colt Coral Colt Coral Elkhorn Coral Elkhorn Coral Cabbage Coral Cabbage Coral Flower Coral Flower Coral Feather Coral Feather Coral Gorgonian Fan Coral Gorgonian Fan Coral Lamellina Coral Lamellina Coral Sun Coral Sun Coral Subergorgia Coral Subergorgia Coral Soft Coral Soft Coral Sea Pen Sea Pen Sea Fan Sea Fan Sea Plume Sea Plume Class Hydrozoa: Green Hydra Class Hydrozoa: Green Hydra Hydra Hydra Brown Hydra with buds Brown Hydra with buds Brown Hydra eating Brown Hydra eating Hydra eating Daphnia Hydra eating Daphnia
• Hydra eats Daphnia Class Scyphozoa: True Jellyfish Class Scyphozoa: True Jellyfish Fried egg jelly Jellyfish Jellyfish Jellyfish Jellyfish Redeyed medusa Jellyfish Jellyfish Jellyfish Jellyfish Jellyfish Jellyfish Lion’s mane Jellyfish Jellyfish Purple lion’s mane Upside down Jelly fish Upside down Jelly fish Upside down Jelly fish Upside down Jelly fish Sea Nettle Sea Nettle Jelly and diver Jelly and diver Giant Jelly off Coast of Japan Giant Jelly off Coast of Japan Beached Jelly fish Beached Jelly fish Jelly fish Humor Jelly fish Humor Portuguese Portuguese Man 0’ War (a Hydrozoan), NOT a true jelly fish Portuguese Man 0’ War Portuguese Man 0’ War Tentacles of Physalia physalis Portuguese Man o’ War Portuguese Man o’ War vs. Box Jelly fish Class Cubozoa: Box Jellyfish Class Cubozoa: Box Jellyfish Chironex fleckeri Chironex fleckeri the Box jelly fish S ve LifeProce s en sse
Movement Reproduction Sensitivity Nutrition Excretion Respiration Growth MRS NERG What one MAIN characteristic do ALL organisms have in common?
They're all made of cells! ...
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This note was uploaded on 10/28/2010 for the course BIOLOGY BIO-1B taught by Professor Dehaan during the Spring '10 term at Berkeley College.
- Spring '10