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Biomagnetism
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Waves
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Infrasonic Waves
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Stuffs
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Species: Galeocerdo
cuvier
Weight: 998.0 kg ( 2200.0
lbs)
Habits, physical and social structures: The tiger shark travels alone along the coastal and offshore waters of tropical seas, rarely stopping to eat- however, when they do eat, the shark will catch anything it is able to find, even that which is artificial, manufactured by homo sapiens. Its skin is rough, much like sandpaper, made of tiny "teeth", which may be found in larger form within the mouth as flat, triangular, serrated-edged teeth that are replaced upon falling out. The shark relies on many senses to navigate and catch prey, including infrasound, a sensitive sense of smell which can detect the faintest traces of blood, keen eyesight, and detection of electricity in the water. It will circle its prey before attacking and will attack humans, however, they will not devour the remains. It is also stated that the sharks are normally gentle and attacks are due to sudden aggressiveness or fear. Offspring are born completely independent with a complete set of teeth, able to swim away and hunt as soon as they are born. Sharks lack an air-bladder and thus will sink in water, as they are heavier, so they must constantly swim to stay afloat. To breathe, they need only open their mouths: most sharks are known to have five pairs of gill slits opening to clefts, located behind the head, which connect the back of the shark’s mouth with the exterior. The clefts are divided by branchial arches (cartilage walls) and movements are coordinated by muscles, which force water from the mouth over the gills and out the gill slits. The generalized respiratory is as follows: water drawn into mouth upon opening which closes the gill slits by use a of valve-like contraption; water is forced into gill pouches as volume in mouth cavity decreases, the water being pushed over the gills; blood absorbs oxygen, giving off carbon dioxide; gill pouches and mouth cavity contract, the water being expelled through gill slits and the cycle repeats. Physics Application(s): Bioelectricity: The shark employs electricity for internal processes, but has the ability to detect small electrical discharges and minute movements in the water by use of electroreceptors found around the mouth. Such ultra-sensitive electroreceptors can also detect body fields generated by homo sapiens and other organisms, where electrical discharges in the salt water may provoke attack. Sharks are known to mistake the smallest electrical signals for life because they are so sensitive: even a five-billionth of a volt may be detected. However, sharks are easily confused by the electromagnetic waves emitted by nuclear subs, to which Hammerhead sharks are attracted, and in response, new submarine designs are being considered to prevent the attraction.
Anemaw [Animal Electromagnetism and Waves] © Elizabeth Gerrow 2002 . |
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