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Caution: Sharks!!!!! (pg. 2)
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| pkcRAISTLIN |
what's the first symptom of AIDS?
a pounding sensation in the anus. |
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| colonelcrisp |
| quote: | Originally posted by pkcRAISTLIN
what's the first symptom of AIDS?
a pounding sensation in the anus. |
so much for the clean boxers....... lol |
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| PoisonJam19 |
| I love sharks, terrifying yet amazing creatures. Those spider pics however gave me the jeebies. I hate those damn things. |
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| Nrg2Nfinit |
its intresting that sharks are completely made out of cartelidge (their skeletal structure) havening acquired bone loss which enables them to be lighter and more agile.
Its funny to know that their skin is comprised of teeth (denticles). |
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| PoisonJam19 |
| quote: | Originally posted by Nrg2Nfinit
its intresting that sharks are completely made out of cartelidge (their skeletal structure) havening acquired bone loss which enables them to be lighter and more agile.
Its funny to know that their skin is comprised of teeth (denticles). |
Yup. Also they lack a swim-bladder, meaning that they can't maintain their own bouyancy, which requires them to swim constantly, or else they'll sink. |
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| Nrg2Nfinit |
| i think this is compensated by the production of oil in their liver or something. They do have some sort of buoyancy alternative if im not mistaken. |
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| PoisonJam19 |
| quote: | Originally posted by Nrg2Nfinit
i think this is compensated by the production of oil in their liver or something. They do have some sort of buoyancy alternative if im not mistaken. |
I think there are a few species that can, but most (great whites, hammerheads, etc.) cannot. |
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| Nrg2Nfinit |
| quote: | Originally posted by PoisonJam19
I think there are a few species that can, but most (great whites, hammerheads, etc.) cannot. |
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http://en.wikipedia.org/wiki/Shark
"Unlike bony fish, sharks do not have gas-filled swim bladders, but instead rely on a large liver filled with oil that contains squalene. The liver may constitute up to 30% of their body mass[6] for buoyancy. Its effectiveness is limited, so sharks employ dynamic lift to maintain depth and sink when they stop swimming. Some sharks, if inverted or stroked on the nose, enter a natural state of tonic immobility - researchers use this condition for handling sharks safely.[7] Sandtiger sharks are also known to gulp air from the surface and store it in their stomachs, using the stomach as a swim bladder."
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Here we go, You are correct though, its only slight buoyancy and its not very effective. They have to use dynamic lift (as you explained) to keep themselves aloft. |
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| PoisonJam19 |
| quote: | Originally posted by Nrg2Nfinit
Here we go, You are correct though, its only slight buoyancy and its not very effective. They have to use dynamic lift (as you explained) to keep themselves aloft. |
Interesting, especially the fact about the sandtiger shark. |
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| Ian |
I approve. |
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| Nrg2Nfinit |
| quote: | Originally posted by PoisonJam19
Interesting, especially the fact about the sandtiger shark. |
very, But im sure that air cannot be used to respire. |
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