because thats how god made them if you have a problem go see him
Tiger sharks have they have 5 gills
Sharks typically have 5 to 7 pairs of gill slits located on the sides of their bodies. These slits are used for obtaining oxygen from the water to breathe.
A whale shark's mouth can open up to approximately 5 feet (1.5 meters) wide. This enormous mouth allows them to filter-feed on plankton and small fish as they swim through the water. Despite their size, whale sharks are gentle giants and pose no threat to humans.
Well, I could go on and on why sharks are awesome, but I'll just list some of them: 1. Sharks have six sense's, instead of just five like us 2. Some sharks, (Great White's, Mako sharks, etc.) can leap twenty feat out of the water 3. Whale sharks have more than two eyes 4. Sharks where alive before dinosaurs. 5. Some sharks, (like Caribbean Reef sharks) can sleep, they just don't need to close there eyes
-sharks have cartalige, NOT bones -the myth "a shark can sense a drop of blood in an olympic sized swimming pool", not true. they could smell a drop of fish blood, not human blood...-the dorsal fin on a shark is bent backwards-sharks can have anywhere between 5-7 gills-sharks are attracted to flashy/bright/highly contrasting colors because they remind them of a fish-sharks can range from being able to hold them in your hand, to being over 60 feet long
It depends on the species of Shark. Whale Sharks are the largest fish in the sea, and can live a VERY long time.
some live in saltyer water than others and the extra gills let more oxogen in the saltyer waters
Tiger sharks, like most sharks, have 5 gill slits on each side of the head. Other species, however, may have six or seven per side.
Sharks have five to seven gill slits on the sides of their bodies, which are used for breathing. These gill slits allow water to flow over the gills, where oxygen is extracted and carbon dioxide is expelled. The number of gill slits can vary among shark species, but this anatomical feature is essential for their survival in aquatic environments. The lines often referred to are actually the external openings leading to these gills.
25 elephants to make a blue whale witch is about 200000 lbs
5
Quite simple. I have studied sharks for 5 years. Im only ten. They dont have lungs. They have to keep moving to force water through their gills. Other sharks like the White Tip Reef Shark can suck it in. So they force it through their gills and the gills extract the water molecules and let the oxygen molecules that have evaporated in the water flow down to the heart. The heart pumps them through a network of veins to the body cells The body cells turn the nutrients into energy. When the body cells do this the make a waste gas called carbon dioxide (c02) The heart can pump two ways so it pumps up the c02 back to the gills that extract them back into the water. It has to do that each breath.