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Sharks employ a number of mechanisms to maintain their position in the water column, one is physiological in the form of an enlarged liver with a large oil content. The other ways are morphological. The pectoral fins are aerofoils (like the wings of a plane), being convexly curved on the dorsal side and flat or concave on the ventral side. As the water moves across the fin the water particles move faster and are spread further apart on the dorsal side which results in the water moving over the top of the fin to have a higher pressure than the water below, water (and air) moves from areas of low pressure to high, and so the water under the fin moves upwards, pushing the fin up. This is enhanced but the upwardly pointed snout. The other mechanism work to push the tail upwards. The spinal colum runs along the upper lobe of the caudal fin (tail fin), as the shark beats its tail side the side the upper lobe moves ahead of the lower and 'flops', as the lower lobe swings is moves in a downwards motion, as it does so it pushes the water down and so pushes the tail up
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Why do sharks have large livers?
to help keep buoyancy
Why is liver the main organ for sharks buoyancy if it only gives off oil in not so large quantities while stomach can hold and compress air and use them like submarines?
Liver is much larger in sharks as compared to stomach.Liver not only helps in buoyancy but also keeps shark upright. there are other factors which are also involved in buoyancy.
What do sharks lack that makes them different from many other fish?
Sharks have no swim bladder for buoyancy. Instead, an oily liver aids in bouyancy.
Why do sharks have oil in their livers?
to help the shark stay afloat
How do you use buoyancy?
Buoyancy is what keeps a boat floating on the top of the water. Buoyancy is what makes a helium balloon float in the air.
How do you use the buoyancy on a boat?
By putting it in water.
How does a shark regulate its buoyancy?
Sharks are slightly heavier than water, so they naturally tend to sink. Buoyancy or lift is provided in two ways. First, sharks store large quantities of oil in their liver. Because oil is less dense than water, storing this oil decreases the overall density of the shark, and increases its buoyancy. Second, as a shark swims, its pectoral fins provide lift, in much the same way the wings of an airplane does. If a shark stops swimming it will sink, but its stored oil and relatively light skeleton help it to float and decreases the amount of energy that must be expended on swimming.Read more: Sharks - Locomotion And Buoyancy - Water, Oil, Caudal, and Swimming - JRank Articles http://science.jrank.org/pages/6112/Sharks-Locomotion-buoyancy.html#ixzz2S6ZbwMcg
Why do the fish have a swim bladder?
The swim bladder is in animals that need something to help control their buoyancy. Sharks do not have swim bladders because they do not need this.
What affect provided by water aerobics helps make the exercise beneficial?
Buoyancy
Use buoyancy to describe why any objects floats?
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What is urea and how do sharks use it?
well it is what your pee is made out of and Sharks use it to mark their territory
Use the particle model to explain buoyancy?
The ramp method best explains the particle model as far as buoyancy is concerned.
