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Phylum Cnidaria & Ctenophora

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Presentation on theme: "Phylum Cnidaria & Ctenophora"— Presentation transcript:

1 Phylum Cnidaria & Ctenophora
“Jelly Fish” “Comb Jelly's” Kingdom: Animalia Kingdom: Animalia Phylum:Cnidairia Phylum:Ctenophora Classes: Anthozoa Classes: Tentaculata Hydrozoa Nuda Scyphozoa BY: Alex Lingg and a little of Trevor Brown

2 Phylum Cindaria Jelly fish Over 10,000 living species
Three Distinct Groups: Anthozoa (Corals and sea anemones) Hydrozoa(Hydroids) Scyphozoa (true jelly fish) Coral Hydroid True Jelly

3 Phylum Ctenophora True Jelly's Only about 100-150 species known
Only two different species: - both considered comb jelly's

4 Major Characteristics: Cindaria
distinguished by having cells that have harpoon like or stinging tentacles that are used to eat and to lure prey basement membranes muscles nervous systems some have sensory organs

5 Major Characteristics: Ctenophora
distinguished from that they have colloblasts, cells that capture prey by squirting glue on them 1 millimeter to 1.5 meters in size Most species have “comb rows” which are bands of cilia overlapping around the body

6 Feeding: Cindaria Can feed by: absorbing dissolved organic chemicals
filtering food particles out of the water obtaining nutrients from algae within their cells Some depend almost completely on absorbing dissolved nutrients

7 Feeding: Ctenophora All are predators Eat 10 times their body weight
Eat zooplankton mollusk fish larvae

8 Reproduction: Cnidaria
Can reproduce sexually and asexually The adults have gonads, which release ova and sperm into the water in the breeding season Asexually they produce buds or split right down the middle

9 Reproduction: Ctenophora
Almost all of the species are hermaphrodites, which means they function as both male and female

10 Structure / Anatomy: Cnidaria Ctenophora two cell layers
First is the ectoderm which includes the epidermis, the nervous tissue Second is endoderm which includes the gut and associated glands Ctenophora two cell layers the outer layer of the epidermis consists of: -sensory cells -secretion - protection The inner layer of the epidermis contains a nerve net and muscles

11 Skeletal / Muscular: Cnidaria
They have a mesoglea is the translucent, jelly-like substance found between the two epithelial cell layers in the bodies of coelenterates Mostly water The mesoglea has muscle bundles and nerve fibers Water is used for boyancy

12 Search Results Structure / Anatomy:

13 Structure / Anatomy:


15 Locomotion: Cinardia swim by a form of jet propulsion muscles squeeze water out of the cavity tissue layers are very thin, its hard to swim against currents just enough to control movement within currents

16 Locomotive: Ctenophora
Use combs to swim They can go in the reverse direction! When trying to escape predators, they can accelerate to six times its normal speed

17 Nervous system and senses
Cnidaria have no brains or even central nervous systems Instead they have nerve nets consisting of sensory neurons that generate signals in response to various types of stimulus Can sense tilt Most species have simple eyes Although the eyes probably do not form images, they can distinguish the direction as well as navigate around solid-colored objects

18 Nervous system and scenses
Ctenophora has no brain or central nervous system but instead have a nerve net The largest single sensory feature is the aboral organ Its main component is a statocyst which is a balance sensor Has cilia which are balancers that sense its orientation.

19 Regeneration Ctenophora can’t Cnidaria All can regenerate
This means they can recover from an injury reproduce asexually They gather small pieces or even collections of separated cells recover even after apparently being destroyed by predators Ctenophora can’t

20 Feeding Cnardia When prey is swallowed, it is liquefied by enzymes
Ctenophora Once the food is in the digestive cavity, gland cells release enzymes that reduce the prey to slurry

21 Respiration Ctenophora
The resulting slurry is wafted through the canal system by the beating of the cilia The ciliary rosettes in the canals may help to transport nutrients to muscles in the stomach Cnardia The slurry circulates through the digestive cavity, through the connecting tunnels the circulation of nutrients is driven by water currents or by muscular movements Nutrients reach the outer cell layer by diffusion

22 Excretion Ctenophora The anal pores may eject unwanted small particles, but most unwanted matter is regurgitated via the mouth Cnardia Indigestible remains of prey are expelled through the mouth. The main waste product of cells' internal processes is removed by the external and internal water currents

23 Class: Cubozoa Box jellyfish distinguished by being cube-shape
known for the extremely potent venom the most venomous creatures in the world tings from these are extremely painful and sometimes fatal to humans

24 Class: Hydrozoa are a taxonomic class of very small, predatory animals
most living in saltwater are related to jellyfish and corals

25 Class: Scyphozoans Scyphozoans have no durable hard parts, including no head, no skeleton and no specialized organs for respiration or excretion consist of as much as 99% water and therefore are rarely found in fossil form

26 Class: Tentaculata A class of comb jellies
common feature is a pair of long, feathery, contractile tentacles the tentacles are sticky-tipped cells that trap small prey

27 Class: Nuda A class of comb jellies
They are distinguished from other comb jellies by the complete absence of tentacles, in both juvenile and adult stages

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