We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
Published bySusana Tyre
Modified over 2 years ago
Kingdom Animalia Phylum Cnidaria
Characteristics Radial or biradial symmetry Diploblastic organizationMesoglea between epidermis and gastrodermis Gastrovascular cavity Nerve net Cnidocytes – used in defense and feeding
Reproduction/Life CycleCan be monoecious or dioecious Alternate generations between polyp and medusa form Polyp – asexual and sessile Medusa – dioecious and free swimming
Reproduction Cont’d Planula – Cnidaria larvaePolyps are produced by budding or planula Medusae formed by budding from a polyp body wall
Feeding Use cnidocytes to stun or kill preyTentacles contract to bring food to mouth Food is digested in gastrovascular cavity
Support and LocomotionHydrostatic Skeleton Some classes have longitudinal muscles that aid in movement Polyps – somersault, inchworm, glide on base, and walk on their tentacles Medusae – swim and float
Classification Class Hydrozoa Class Scyphozoa Class CubozoaClass Anthozoa
Class Hydrozoa Mostly marine, but the only class with freshwater members! Alternate generations Mostly colonial polyps
Obelia Gastrozooid – feeding polyp formed from planula larvaeGrows through budding into more gastrozooids Gonozooid – reproductive polyp that forms medusa by budding Medusae then reproduce sexually
Gonionemus Medusa predominantHas a velum (shelf-like lip that projects inward) Velum creates jet propulsion Mouth at end of a manubrium Nerve ring that coordinates swimming movements Statocyst – responds to gravity
Hydra Freshwater Polyps only, no medusae Testes form sperm by meiosisOvaries form one egg each
Physalia Portuguese man-of-war Colonial Cannot swimCnidocytes in tentacles are lethal to small vertebrates and dangerous to humans
Class Scyphozoa All marine “True Jellyfish” – medusa dominant
Stinging Nettle, Mastigias
Aurelia Gastrodermal cells have cilia to circulate foodFeeds on plankton Rhopalia – chemoreceptors Lappets – touch receptors Statocysts – gravity sensors Ocelli - photoreceptors
Class Cubozoa Medusae are cuboidal Polyps are reduced or absentTentacles hang from corners
Class Anthozoa Polyps only, no medusae Mouth has a pharynxGastrovascular cavity is divided into sections Sexual and asexual reproduction
Today’s Objectives: 3.4 Describe characteristics of this phylum
Kingdom Animalia Phylum Cnidaria. Characteristics Radial symmetry Diploblastic organization, 2 official tissue layers Gelatinous Mesoglea Gastrovascular.
Phylum Cnidaria jellyfish, hydras, sea anemones, coraljellyfish, hydras, sea anemones, coral.
All contain nematocysts-stinging structures
CNIDARIANS. What makes Cnidarians Unique? Cnidarians are group of animals that are very diverse from stony coral to jellyfish. What common thread keeps.
Phylum Cnidaria A highly diverse assemblage that includes jellyfish, sea anemonies, corals and hydras.
Ch Phylum CNIDARIA hydras, jellyfish, sea anemones, and coral Found all over the world Can live individually or in colonies.
Simple InvertebratesSection 2 CH 27 Phylum Cnidaria Jelly-fish, coral, sea anemones, and hydras.
Cnidaria. General Information Eumetazoans (true animals) all animals other than sponges-have both tissues and symmetry When eumetazoans develop-they.
Cnidarians Jellies, Anemones, Corals
Tree of Life The tree of life according to Ernst Haeckel, 1891.
Phylum Cnidaria Hydra, jellyfish, coral, & sea anemones.
Phylum Cnidaria. Cnidarians - jellyfish, coral, hydra, sea anemone *Named after the stinging cells found on their tentacles called CNIDOCYTES.
Phylum Cnidaria Radial or biradial symmetry No posterior or anterior ends Instead they have oral (end with the mouth) and aboral ends Mostly marine Over.
1 Cnidarians & Ctenophorans 1copyright cmassengale.
1 Unit 4.2 Phylum Cnidaria. 2 Phylum Cnidaria Radial symmetry Mouth at oral end surrounded by tentacles. One opening into and out of gastrovascular cavity.
P HYLUM C NIDARIA (Sea Anemones, Jellyfish, Coral, Hydras) ~ species FACT: Cnidarians have a single external opening that serves as both the mouth.
Sponges Cnidarians Ctenophores
Phylum Cnidaria General Characteristics: – Cnidarian means “stinging creature.” – Radial symmetry – Two different body plans exist: medusa and polyp –
Systematic Adaptations of Phylum Cnideria The Jellies, Anemone and Corals.
So... don’t just sit there... “Even if you are on the right track, ~ Will Rogers you will get run over if you just sit there.” answer a few of these questions!
Porifera: Very Simple Animals...(?)
Parazoa no true tissues Eumetazoa Multicellularity RadiataBilateria.
Phylum Cnidaria Jellyfish, Corals, and Sea Anemones.
CNIDARIA Kingdom: Animalia Phylum: Cnidaria or Coelenterata Cnidarians are the oldest existing animals that have specialized tissues.
CNIDARIA. Characteristics Class Scyphozoa- Jellyfish- medusa form Class Antozoa- corals, sea anemones- polyp form Class Hydrozoa- Hydras Tentacles.
JELLYFISH SEA ANEMONE Phylum Cnidaria Sea Anemone Jellyfish Coral Cnidarian Video.
Sponges, Cnidarians, and Ctenophores Chapter 33 Table of Contents Section 1 Porifera Section 2 Cnidaria and Ctenophora.
TISSUE level of body organization Middle layer = MESOGLEA = Acellular matrix (Just jelly!) Diagnostic cell type = CNIDOCYTE It contains the Nematocyst.
PHYLUM ‘Sea walnuts’/‘Comb jellies’ CTENOPHORA TISSUE level of body org. RADIAL Symmetry Bodies often transparent &/or luminescent Locomotion = most are.
BSC 2011L. Kingdom Animalia All animals are multicelluar and heterotrophic Some means of locomotion Always diploid.
Marine Invertebrate Zoology
Chapter 26-3 Cnidarians by us three :).
Phylum Cnidaria stinging-celled animals Jellyfishes, corals, anemones Radial symmetry Two tissue layers with inner mesoglea Primitive nerve net but no.
Phylum Cnidaria The Cnidarians species Jellyfish Sea anemones Corals Hydra.
Phylum Cnidaria: “ stinging cell ” Hollow gut- (coel) On earth- since 670 MYA radial symmetry Germ Layers: 2 epidermal (ectoderm) gastrodermal.
1 Phylum Cnidaria BIO 2215 Oklahoma City Community College Dennis Anderson.
Phylum Porifera Sponges Phylum Cnidaria Jellyfish, corals.....
© 2017 SlidePlayer.com Inc. All rights reserved.