1. CNIDARIA THE STINGERS BY: DOUG LANG

2. CHARACTERISTICS Inter-cell connections Carpet-like basement membranes Muscles Nerve net Statocyst Hydrostatic skeleton

3. ANATOMY Tentacle Nematocyst Mouth Gastrovascular cavity Bud Ocelli

4. DIGESTION Eating- Predation absorb dissolved chemicals filter food particles from water Two-way digestion Digestive waste- Enzymes reduce prey to slurry Gastroderm cells absorb nutrients Indigestible remains of prey go out mouth

5. RESPIRATION no respiratory organs Gas exchange over body surface Some pump water in and out of digestive cavity without opening mouth

6. INTERNAL TRANSPORT Do not have a organized internal transport Large gastrovascular cavity carries partially digested food through body Do not have any blood Gellationous material throughout their body The gellationous material is a storage unit for oxygen

7. EXCRETION Prey is broken down into slurry by enzymes Absorbs the nutrients After absorbed cells digest nutrients that takes a few days Releases the Indigestible remains out of the mouth Water currents remove cells’ internal processes (ammonia)

8. RESPONSE Nerve net Special cells cause contractions of muscle-like tissue Movement of tentacles during prey capture Sensor organs No brain No eyes

9. MOVEMENT Only move when they are at the jelly fish stage. Hydrostatic Skeleton Some use jets to propel them Some are sessile Some sea anemones can slowly creep over rocks

10. REPRODUCTION Sexually Mass spawnings can make the water cloudy from so much gametes Water temperature lighting conditions trigger the spawning Asexually Polyps bud and occasionally split down the middle or above base Medusa split down the middle Larva stage, Polyp stage, Polyp strobilates, and Medusa stage 1-3 larva searches for site 4-8 Polyp grows 9-11 Polyp strobilates 12-14 Medusa grows

11. EXAMPLES Sea Anemone Jellyfish Corals Sea Pens Box Jellies

12. FACTS (AKA FUN FACTS) The word Cnidaria comes from the Greek word “cnidos” that means stinging nettle Clownfish and Sea anemones have a symbiotic relationship Urinating on a jellyfish sting could make it worse or make it better Most corals do sting 130 different species have been recorded in Sydney Harbor Nematocysts fire tiny harpoon-like spears loaded with venom into prey. The firing of nematocysts is the fastest reaction in the animal kingdom.

13. LITERATURE CITED http://en.wikipedia.org/wiki/Cnidaria#Feeding_and_excretion http://cnidarianh.blogspot.com/2007/02/feeding-respiration-excretion.html http://cnidarianh.blogspot.com/2007/03/movement.html https://www.boundless.com/biology/textbooks/boundless-biology-textbook/the- musculoskeletal-system-38/types-of-skeletal-systems-215/hydrostatic-skeleton- exoskeleton-and-endoskeleton-812-12051/ https://www.boundless.com/biology/textbooks/boundless-biology-textbook/the- musculoskeletal-system-38/types-of-skeletal-systems-215/hydrostatic-skeleton- exoskeleton-and-endoskeleton-812-12051/ http://cnidarianh.blogspot.com/2007/02/internal-transport.html http://phylum-cnidaria.wikispaces.com/FUN+FACTS http://w3.shorecrest.org/~Lisa_Peck/MarineBio/syllabus/ch7invertebrates/Inve rtwp/invert_wp_05/cnidaria/miles1/Cool.htm http://w3.shorecrest.org/~Lisa_Peck/MarineBio/syllabus/ch7invertebrates/Inve rtwp/invert_wp_05/cnidaria/miles1/Cool.htm