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Unlike most fish, sharks possess skeletons made completely of cartilage. Cartilage is a softer, more flexible tissue than bone. The reason you can bend your ear or tip of your nose is because it's supported by cartilage. Most bones in our body are formed by cartilage precursors that later become calcified to form the hard skeletal tissue we know as bone. Sharks actually do form some types of calcified tissues, such as their teeth, so they do have the ability to form bone. Then why don't they form bone for their whole skeleton? Well, sharks evolved from bony ancestors so in fact they actually evolved to not produce a bony skeleton. There are several ideas why this may have occurred. One thought is that the evolution of a cartilaginous skeleton gives sharks a more flexible, maneuverable body, making them extremely well adapted for a variety of swimming modes. A flexible body is also helpful for moving around complex habitats and tucking into small spaces and crevices.
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∙ 12y ago
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Which fish does not have bones?
Most fish have bones. Sharks and rays do not have bones but they do have bone-like structures that are made from cartilage.
What do sharks not have?
Sharks don't have bones they have cartilage
How many bones of sharks?
ZERO.....sharks don't have any bones unless they have ingested them through eating something that did....sharks have cartilage....
What is speaical about sharks bones?
apparently sharks do not have bones they have cartalige like humans ears and noses
Do sharks have bone marrow?
Sharks don't have bones.
If sharks have no bones how do they have hard bodies?
a sharks "skeleton" is made of cartilage.
Are sharks jaws made of bones?
No. there is no bone in a sharks body. The sharks skeleton is made of cartilage.
Sharks do not have bones so what keeps their bodies from caving in?
They do have bones and that is a fact!!! They do not have bones, they have cartilage.
Do sharks get arthitis?
Unlikely, as they have no bones.
What is a sharks bones made of?
cartilage
How many bones in shark body?
Sharks do not have bones, they have skeletons made of cartilage.
What has a spine but without bones?
Answer to the riddle: A book. Geographic answer: A mountain Range. Science answer: Sharks. (Instead of bones, sharks have a spine and cartilage)
