Sponges and Cnidarian organisms Pavel Yordanov Teodor Peev Alex Simeonov 10/3
Sponges
Sponges Structure [3] <ul><li>Simplest  invertebrate multi-cellular animals </li></ul><ul><li>Their scientific name is “Po...
How do sponges eat? [4] <ul><li>They have pores on their sides called ostias which lead water inside of the sponge in cana...
Sponge Reproduction [3] <ul><li>Sponges are hermaphrodites </li></ul><ul><li>During the reproduction they can be classifie...
Jellyfish
Jellyfish Structure [1] <ul><li>Radial symmetry. </li></ul><ul><li>They have no brain, but a simple nervous system. </li><...
Jellyfish Reproduction [1]   <ul><li>Jellyfish can have sex, the male releases sperm and the female swallows it </li></ul>...
The Moon Jellyfish [2] <ul><li>Scientific name – Aurelia aurita </li></ul><ul><li>5-40 cm in size </li></ul><ul><li>Can be...
Hydra
What is a Hydra? [5] <ul><li>A hydra is a small animal that are 1,5 cm long </li></ul><ul><li>They live in fresh water </l...
Hydra Reproduction [5][6] <ul><li>Both sexual and asexual reproduction </li></ul><ul><li>When there is asexual reproductio...
FUN FACTS <ul><li>The box jellyfish has killed more people than any other marine animal! </li></ul><ul><li>Jellyfish video...
Works Cited <ul><li>[1]  &quot;Moon Jellyfish&quot;. Pattern Media. March 29, 2010 <http://www.jellyfishfacts.net/moon-jel...
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Cnidarians 10 3 alex, pavel, teodor

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Cnidarians 10 3 alex, pavel, teodor

  1. 1. Sponges and Cnidarian organisms Pavel Yordanov Teodor Peev Alex Simeonov 10/3
  2. 2. Sponges
  3. 3. Sponges Structure [3] <ul><li>Simplest invertebrate multi-cellular animals </li></ul><ul><li>Their scientific name is “Porifera” meaning “pore bearing” </li></ul><ul><li>Sponges not necessarily have symmetry </li></ul><ul><li>Stuck to the ground with roots called holdfasts </li></ul><ul><li>They have a osculum- a large opening through which water flows out of the sponge; But why does it do it? </li></ul>
  4. 4. How do sponges eat? [4] <ul><li>They have pores on their sides called ostias which lead water inside of the sponge in canals </li></ul><ul><li>Sponges contain collar cells which break down water into oxygen and nutrients. Waste products are spit out of the osculum </li></ul>
  5. 5. Sponge Reproduction [3] <ul><li>Sponges are hermaphrodites </li></ul><ul><li>During the reproduction they can be classified as either male or female </li></ul><ul><li>Male sponge releases sperm which enters the female sponge </li></ul><ul><li>After this process a larvae is produced from the female sponge </li></ul><ul><li>A few days later the larvae settles down and starts to grow </li></ul>
  6. 6. Jellyfish
  7. 7. Jellyfish Structure [1] <ul><li>Radial symmetry. </li></ul><ul><li>They have no brain, but a simple nervous system. </li></ul><ul><li>They are 98% water. </li></ul><ul><li>A jellyfish has a bell (hood), a mouth, oral arms, tentacles, a stomach and gonads. </li></ul><ul><li>The gonads are the reproductive organs </li></ul>
  8. 8. Jellyfish Reproduction [1] <ul><li>Jellyfish can have sex, the male releases sperm and the female swallows it </li></ul><ul><li>The female spawns a larvae that roots itself to the bottom - polyp </li></ul><ul><li>After some development, several baby jellyfish come out of the polyp </li></ul><ul><li>Jellyfish can also reproduce asexually, by budding out polyps on its body </li></ul>
  9. 9. The Moon Jellyfish [2] <ul><li>Scientific name – Aurelia aurita </li></ul><ul><li>5-40 cm in size </li></ul><ul><li>Can be found in the pacific and indian oceans or inland seas </li></ul><ul><li>They feed on plankton </li></ul><ul><li>Moon Jellyfish reproduce normally </li></ul><ul><li>Their sting isn’t dangerous to humans </li></ul>
  10. 10. Hydra
  11. 11. What is a Hydra? [5] <ul><li>A hydra is a small animal that are 1,5 cm long </li></ul><ul><li>They live in fresh water </li></ul><ul><li>They have radial symmetry </li></ul><ul><li>They look like a sack with tentacles in front. </li></ul><ul><li>On these tentacles they have stinging cells, with which they stun their prey </li></ul>
  12. 12. Hydra Reproduction [5][6] <ul><li>Both sexual and asexual reproduction </li></ul><ul><li>When there is asexual reproduction it is like a plant. Simply said, small hydras grow on big ones and detach themselves after growing. </li></ul><ul><li>When there is sexual reproduction, the hydra is a hermaphrodite and lays an egg </li></ul>
  13. 13. FUN FACTS <ul><li>The box jellyfish has killed more people than any other marine animal! </li></ul><ul><li>Jellyfish video - http :// www . youtube . com / watch ?v=GTXinF8ZVCo </li></ul><ul><li>These jellyfish came to lake Palau because it was connected to the sea with a tunnel. The tunnel was destroyed and the jellyfish were trapped. They evolved and no longer needed their poison, since there are no predators for them there. There was no food for them in the lake, so they photosynthesized. </li></ul>
  14. 14. Works Cited <ul><li>[1] &quot;Moon Jellyfish&quot;. Pattern Media. March 29, 2010 <http://www.jellyfishfacts.net/moon-jellyfish.html>. </li></ul><ul><li>[2] &quot;Jelly Fish&quot;. SCDNR. March 29, 2010 <http://www.dnr.sc.gov/marine/pub/seascience/jellyfi.html>. </li></ul><ul><li>[3] &quot;Sponges&quot;. Missouri Botanical Garden. March 21, 2010 <http://www.mbgnet.net/salt/coral/animals/sponges.htm>. </li></ul><ul><li>[4] &quot;The Wonders of the Seas: Sponges&quot;. Oceanic Research Group. March 21, 2010 <http://www.oceanicresearch.org/education/wonders/sponges.html>. </li></ul><ul><li>[5] Smith, S.. &quot;What is a Hydra?&quot;. wiseGEEK. March 29, 2010 <http://www.wisegeek.com/what-is-a-hydra.htm>. </li></ul><ul><li>[6] &quot;Hydra&quot;. Natural Aquariums. March 29, 2010 <http://naturalaquariums.com/inverts/hydra.html>. </li></ul>
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