Cnidarians (Coelenterates). Phylum Cnidaria (Coelenterata) Class Hydrozoa = Hydra POLYP body form = “vase shaped” ; sessile Most live in colonies. 1 of.

Slides:

Advertisements

Similar presentations

All contain nematocysts-stinging structures

Advertisements

Cnidarians Jellies, Anemones, Corals

Porifera: Very Simple Animals...(?)

 Have tentacles with nematocysts near mouth.  Nematocysts are stinging cells  Cnidaria is Greek for “stinging cell”  Examples: jellyfish, sea anemone,

Hydra, Jellyfish, Coral, & Sea Anemones

Simple InvertebratesSection 2 CH 27 Phylum Cnidaria Jelly-fish, coral, sea anemones, and hydras.

35-2 Cnidaria and Ctenophora

Phylum Cnidaria or Coelenterata

Phylum Cnidaria Jellyfish, hydra, sea anemones, & coral.

Chapter 26-3 Cnidarians by us three :).

Phylum Cnidaria.

Phylum: Cnidarians.

Phylum Cnidaria Cnidos = “Stinging Needle”

Phylum Cnidaria.

Cnidarians Jellyfish, Hydra, Corals, Sea Anemones, Sea Fans and Sea Pens.

Phylum Cnidaria.

Phylum Cnidaria.

-heterotrophs, multi-cellular, eukaryotes -no cell walls.

Jellyfish, Corals, and Sea Anemones

Phylum Cnidaria stinging-celled animals Jellyfishes, corals, anemones Radial symmetry Two tissue layers with inner mesoglea Primitive nerve net but no.

Phylum Cnidaria General Characteristics: – Cnidarian means “stinging creature.” – Radial symmetry – Two different body plans exist: medusa and polyp –

Chapter 33 Table of Contents Section 1 Porifera

Sponges. Phylum Porifera – “pore-bearers” (although now sponges are in multiple phyla) Sponges Tiny openings, pores, all over the body Cambrian Period.

Phylum Cnidaria Pages CNIDARIANS- “STINGING CELLS” SEA JELLIES SEA ANEMONES CORALS HYDRA.

Phylum Porifera Sponges Phylum Cnidaria Jellyfish, corals .....

CNIDARIA. Characteristics  Class Scyphozoa- Jellyfish- medusa form  Class Antozoa- corals, sea anemones- polyp form  Class Hydrozoa- Hydras  Tentacles.

Cnidaria. General Information  Eumetazoans  (true animals) all animals other than sponges-have both tissues and symmetry  When eumetazoans develop-they.

Kingdom Animalia Phylum Cnidaria. Characteristics Radial symmetry Diploblastic organization, 2 official tissue layers Gelatinous Mesoglea Gastrovascular.

Phylum Cnidaria. General Characteristics They are radially symmetrical They have 2 tissue layers: Epidermis - Outer layer of cells Gastrodermis Inner.

Poriferans. Phylum Porifera Phylum Porifera – “pore-bearers” Sponges Tiny openings, pores, all over the body Cambrian Period – 540 m.y.a.; oldest and.

Phylum Cnidaria Hydra, jellyfish, coral, & sea anemones.

Phylum Cnidaria.

PHYLUM CNIDARIA (Sea Anemones, Jellyfish, Coral, Hydras)

Phylum Cnidaria & Ctenophora

Phylum Cnidaria jellyfish, hydras, sea anemones, coraljellyfish, hydras, sea anemones, coral.

Parazoa no true tissues Eumetazoa Multicellularity RadiataBilateria.

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.

SPONGES PORIFERA. I was part of the Cambrian explosion!

Hydra, jellyfish, coral, & sea anemones

Lesson 10.2: Cnidarians (Jellies & Corals)

Cnidarians Phylum Cnidaria: “stinging cell” Hollow gut- (coel)

Jelly-fish, coral, sea anemones, and hydras

Hydra, jellyfish, coral, & sea anemones

Cnidarians Phylum Cnidaria: “stinging cell” Hollow gut- (coel)

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…)

Phylum Cnidaria & Ctenophora

Phylum Cnidaria Jellyfish Sea anemone Cnidarian Video Sea Anemone

Sponges Sponges live in water. They grow in many shapes, sizes, and colors. Some have radial symmetry, but most are asymmetrical.

Phylum Cnidaria.

Phylum Cnidaria Chapter 26.

Anjali Chacko, Michelle Fernandez, Rose Zhang

Phylum Cnidaria Class Hydrozoa- hydra Class Scyphozoa- jellyfish

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.

Phylum Cnidaria.

Kingdom Animalia Cnidaria The Stingers

Phylum Cnidaria Chapter 26.

Characteristics Soft bodied Radial symmetry 2 germ layers

Sponges and Cnidarians

Phylum Porifera Sponges Phylum Cnidaria Jellyfish, corals .....

Characteristics Soft bodied Radial symmetry 2 germ layers

Phylum Cnidaria.

Phylum Cnidaria Cnidarian Video Sea Anemone Jellyfish Coral Jellyfish

Presentation transcript:

Cnidarians (Coelenterates)

Phylum Cnidaria (Coelenterata) Class Hydrozoa = Hydra POLYP body form = “vase shaped” ; sessile Most live in colonies. 1 of 3 classes within Phylum Cnidaria

Phylum Cnidaria (Coelenterata) Class Scyphozoa: “Cup Animals” –Medusa body form (bell-shaped); swimming –Commonly known as jellyfish –“Portuguese Man-o-war” –200 different species

Phylum Cnidaria (Coelenterata) Class Anthozoa: “Flower Animals” –6,100 different species –Sea Anemones, Corals –Coral Reef = 30 degrees North or South of the equator, shallow water for photosynthetic algae that live in symbiosis with coral

Classification Common Name: Hydra Scientific Name: Hydra Phylum: Cnidaria Class: Hydrozoa Other: Phylum Coelenterata (Old name)

Major Characteristics Body Plan: Hollow, 2 layered sac Body Cavity: Endoderm, Mesoglea (jelly like), Ectoderm Symmetry: Radial - pull in food from all around Cell Specialization: No Organs, Nematocysts = harpoon like stinging cells; neurotoxins cause paralysis

Life Support Processes Absorption: Gastroderm; directly into the body wall Feeding: tentacles pull food into the mouth; they are carnivores Digestion: Gastroderm (endoderm), food vacuoles in cells Respiration & Circulation: Gastrovascular inner cavity

Life Support Processes Excretion: Mouth opening, diffusion Secretion: sticky base for attachment Response: Nerve Net - contractile fibers in the epidermis; Ocelli - detects light Movement: contractile fibers; tumble motion through the water Reproduction: Asexual = budding; sexual = hermaphrodite (no self fertilization)

Life Support Processes Support: tissue layers, hydroskeleton

Ecological Relationships Freshwater living Solitary - not colonial like most hydrozoans Carnivorous - predatory lifestyle

Body Systems Compared With Humans Tissues - layers like our skin

Advancements Over the Previous Phylum Nervous Structure Movement Active Feeding

Diagram of Hydra

The largest jellyfish is the Arctic Giant Jellyfish: it can have a diameter over 8 ft. with tentacles stretching as long as 120 ft. The most venomous jellyfish is the Australian Sea Wasp; death can occur within 1-3 minutes. The Great Barrier Reef is the worlds largest stony coral structure stretching for 1,260 miles off Northeast Australia.

Lion’s Mane Jellyfish

Coral Reefs can be visible from the air! Preventing beach erosion

Great Barrier Reef - Australia