Phylum Cnidaria - BIOLOGY JUNCTION

Phylum Cnidaria Cnidarians Include Hydras, jellyfish, sea anemones & corals Radially symmetrical Acoelomate Two basic forms: Polyp: Cylindrical form which attach bases to substratum Medusa: Flattened, mouth down version of the polyp. Moves freely

Forms of Cnidarians Body Plan Basic Body Plan: Has an outer epidermis Has an inner gastrodermis which forms a gastrovascular cavity

Has a middle "jelly filled" layer called mesoglea Cnidocytes Cnidarians are predators which have tentacles possessing batteries of special cells called Cnidocytes Cnidocytes contain special stining capsules called nematocysts. When triggered, these cells shoot out a discharge thread which can entangle and/or poison it's intended prey

Reproduction Reproduction can occur sexually by fertilization of egg and sperm forming larvae. Reproduction can also occur asexually through budding 3 Major classes

Class Hydrozoa: Hydras Class Scyphozoa: Jellyfish Class Anthozoa: Anemones and corals Class Hydrozoa: The Hydras Polyp phase is dominant Generally microscopic Generally freshwater

Class Scyphozoa: The Jellies Generally refered tro as jellies Medusa stage is dominant Come in a variety of forms Aggressive

predators, and can be dangerous to humans Jelly Portugese Man-o-war

Class Anthozoa: Anemones & Corals Appear like plants but are animals. Polyp form is dominant. Corals build calcium shells to protect themselves Anemone

Have symbiotic relationship with algae. Can build extensive masses which can form land masses. Coral Polyps

Coral Reefs Clownfish living in An anemone

Recently Viewed Presentations

  • Thermochemistry

    Thermochemistry

    Thermochemistry Cont. Heat vs. Temperature. Heat: energy that is in the process of flowing from an object with a higher temperature to another object with a lower temperature. ... Endo vs. Exo. Endothermic Reaction: process where the system absorbs heat...
  • ACCIDENT INVESTIGATIONREPORTING-PREVENTION Bureau of Workers Comp PA Training

    ACCIDENT INVESTIGATIONREPORTING-PREVENTION Bureau of Workers Comp PA Training

    You're Important! As a safety committee member, supervisor or manager your involvement is key in reducing the amount of accidents/injuries. Your direct involvement in the process of preventing and investigating employee, contractor and visitor accidents can ensure that future incidents...
  • Publishing within the Institutional Repository (IR) Tim Tamminga,

    Publishing within the Institutional Repository (IR) Tim Tamminga,

    Dictionaries, encyclopedias and reference works Excerpt from e-mail from Sona Andrews, Provost and Vice President for Academic Affairs at Boise State University: "I want to share with you this speech by David E. Shulenburger, Vice President for Academic Affairs at...
  • Patient Satisfaction 2016 - dental.ufl.edu

    Patient Satisfaction 2016 - dental.ufl.edu

    Clinics: Response by Patients Seen. UFCDGoal:. 60% of Surveys . Completed * The Figure utilizes calculations provided by the UF College of Dentistry based on number of surveys submitted (1690) rather than the number of usable surveys (1657) that were...
  • Unit Conversions

    Unit Conversions

    School Field/Upstairs Hallway. We are going outside to measure the length and width of the soccer field in meters. If it is raining, we will measure the length and width of the upstairs hallway instead.
  • Childhood cancer - Health Education England

    Childhood cancer - Health Education England

    Childhood Cancer . Dr Sarah Taaffe. ST4 Commissioning Fellow. Grace Kelly LadyBird Trust. RCGP Child and Young Persons Cancer E-learning Session. Takes 30 mins-Encourage everyone to embed this knowledge by doing it tonight - obtaining ecert for eportfolio
  • Présentation PowerPoint

    Présentation PowerPoint

    qui, en fonction de ses propres besoins, est le mieux à même de définir le niveau d'erreur maximale pour chacun de ses équipements. Exemple: NF EN ISO 8655-2 . Pipettes dont le volume nominal est situé entre 50 et 100...
  • FORSYTH COUNTY SCHOOLS 2014 CAPITAL PROGRAM TIMELINE LOCATION

    FORSYTH COUNTY SCHOOLS 2014 CAPITAL PROGRAM TIMELINE LOCATION

    forsyth county schools 2014 capital program timeline location. construction project. architect. a/e start. gc/cm. open. summary status. high school additions and modifications