Phylum Cnidaria.

Slides:



Advertisements
Similar presentations
All contain nematocysts-stinging structures
Advertisements

Cnidarians Jellies, Anemones, Corals
Phylum Cnidaria.
Porifera: Very Simple Animals...(?)
Phylum Cnidaria Anemones, Corals, Hydroids and Jellies
Simple InvertebratesSection 2 CH 27 Phylum Cnidaria Jelly-fish, coral, sea anemones, and hydras.
1 Cnidarians & Ctenophorans 1copyright cmassengale.
35-2 Cnidaria and Ctenophora
Phylum Cnidaria Jellyfish, hydra, sea anemones, & coral.
Cnidarians (Coelenterates). Phylum Cnidaria (Coelenterata) Class Hydrozoa = Hydra POLYP body form = “vase shaped” ; sessile Most live in colonies. 1 of.
Phylum Cnidaria.
Phylum Porifera: Sponges have  specialized cells but no tissues; no symmetry –Sponges are the most  primitive animals on Earth 570 million year old fossils.
Cnidarians Jellyfish, Hydra, Corals, Sea Anemones, Sea Fans and Sea Pens.
Phylum Cnidaria.
Phylum Cnidaria stinging-celled animals Jellyfishes, corals, anemones Radial symmetry Two tissue layers with inner mesoglea Primitive nerve net but no.
Phylum Porifera. Means “pore-bearer” Radial summetry Sessile as adults Includes sponges…not very complex (no tissues/organs/systems) Life functions take.
Chapter 33 Table of Contents Section 1 Porifera
The Jellyfish Cnidarians have radial symmetry, a gastrovascular cavity, and cnidocytes All animals except sponges – Belong to the clade Eumetazoa, the.
1 Cnidarians & Ctenophorans 1copyright cmassengale.
Sec =2013&area=view&x=10&y=10.
CNIDARIA Kingdom: Animalia Phylum: Cnidaria or Coelenterata Cnidarians are the oldest existing animals that have specialized tissues.
Phylum Cnidaria.
Phylum Cnidaria & Ctenophora
Phylum Cnidaria jellyfish, hydras, sea anemones, coraljellyfish, hydras, sea anemones, coral.
Phylum Cnidaria The Cnidarians species Jellyfish Sea anemones Corals Hydra.
JELLYFISH SEA ANEMONE Phylum Cnidaria Sea Anemone Jellyfish Coral Cnidarian Video.
Ch Phylum CNIDARIA hydras, jellyfish, sea anemones, and coral Found all over the world Can live individually or in colonies.
Cnidarians Phylum Cnidaria: “stinging cell” Hollow gut- (coel)
KINGDOM ANIMALIA Phylum Cnidaria
Sponges.
Phylum Cnidaria.
Jelly-fish, coral, sea anemones, and hydras
Phylum Cnidaria Unit 3.2.
copyright cmassengale
Cnidarians Phylum Cnidaria: “stinging cell” Hollow gut- (coel)
MONDAY 2/29/16 Learning Goal:
Sponges & Cnidarians.
Section 2 Cnidaria and Ctenophora
WARM UP Draw a picture of a sponge, showing the ostia, osculum, and collar cells.
Essential Question: What is a cnidarian?
Phylum Cnidaria (jellyfish, coral and other stingers…)
How to Use This Presentation
KINGDOM ANIMALIA Phylum Cnidaria
Phylum Cnidaria & Ctenophora
KINGDOM ANIMALIA Phylum Cnidaria
Phylum Cnidaria Jellyfish Sea anemone Cnidarian Video Sea Anemone
Phylum Cnidaria.
Phylum Cnidaria Chapter 26.
Anjali Chacko, Michelle Fernandez, Rose Zhang
Quick Sponge Quiz How do sponges differ from other animals? How do they feed, respire, and eliminate wastes? Sponges: do not have a mouth or digestive.
Copyright Pearson Prentice Hall
Cnidarians & Ctenophorans
Phylum Cnidaria.
copyright cmassengale
Kingdom Animalia Cnidaria The Stingers
Phylum Cnidaria Chapter 26.
Cnidarians & Ctenophorans
Phylum Cnidaria.
Phylum Cnidaria & Ctenophora
Sponges and Cnidarians
Phylum Cnidaria.
Phylum Porifera Sponges Phylum Cnidaria  Jellyfish, corals .....
Kingdom Animalia Cnidaria The Stingers
Invertebrates Sponges & Cnidarians.
Phylum Cnidaria Cnidarian Video Sea Anemone Jellyfish Coral Jellyfish
KINGDOM ANIMALIA Phylum Cnidaria
Cnidaria Greek word Cnidos meaning stinging nettles
Cnidarians (phylum Cnidaria)
Cnidarians An Overview.
KINGDOM ANIMALIA Phylum Cnidaria
Presentation transcript:

Phylum Cnidaria

Cnidaria A. Contains 1. corals 2. jelly fish (sea jellys) 3. sea anemones 4. hyrda B. All live underwater and nearly all live in the ocean C. Unlike sponges 1. cnidarians have layers of differentiated cells 2. organized into layers of tissue

2. Classes A. Hydrozoan (hydra) = 3700 species 1. polyps form colonies 2. Portuguese man-o-war is a floating hydrozoan colony

B. Anthozoa 1. Sea anemone and coral = 6100 species 2. grow either as solitary or colonial polyps

C. Scyphozoa 1. true jelly fishes (sea jelly) = 200 species 2. adult stage can grow more than 3 m in diameter 3. many are harmless, some are not!

D. Cubozoa 1. box jellyfish 2. bell is in a square formation 3. lethal sting – even human! 4. 3 m in length, up to 15 tentacles per side * No chance of surviving if stung- you will die in 2-3 minutes

Debate where to put Cubozoans phylogenetically Is it related to Scyphoza? Is it related to Hydrozoa? Scientists don’t agree!

3. Phylum Ctenophora A. comb jellies 1. 100 species

4. Body plan = radial symmetry A. Parts are arranged into circles around a central mouth 1. medusa form – bell shape form for swimming B. Top and bottom of animal – no front or back C. Nervous system present, but no “brain” 1. nerve net – diffuse web of interconnected nerve cells 2. allows for responses to environment D. Ocelli 1. organs able to detect presence or absence of light

E. Statocysts 1. organs which determine which way is up 2. used for balance F. Muscle like cells 1. contract when stimulated 2. ability for some movement G. Nematocysts 1. stinging cells used for defense and catching prey 2. sac containing poison and a tiny spring like harpoon 3. the box jelly fish has 5000 nematocysts

Stingers - Nematocysts

5. Feeding A. Tentacles capture prey with nematocysts B. Prey is paralyzed with poison C. Prey is pushed into the mouth to be digested D. Waste is expelled back through the mouth 1. gastrovascular cavity – hollows gut in the center of the body 2. one way in AND out!