what is the skeleton shape of the sharks?

Question

i know that sharks r "Chondrichthyes" mining that they dont have bones , but they do have a skeleton made of cartilage

so what is the shape of their skeleton? , and is it a internsl or perhaps external like the insect , and what is the advantage of a cartilage skeleton?

Answer 1

It is internal (endoskeleton)

It's kind of fish shaped - see the google images site to see what they look like

it's faster to grow and faster to heal but not as strong as bone (but then they don't need it being in water)

Answer 2

The skeleton of the shark is very different from that of bony fish such as cod; it is made from cartilage, which is very light and flexible, although the cartilage in older sharks can sometimes be partly calcified, making it harder and more bone-like. The shark's jaw is variable and is thought to have evolved from the first gill arch. It is not attached to the cranium and has extra mineral deposits to give it greater strength.

http://en.wikipedia.org/wiki/Shark

Answer 3

sharks are cartilagenous and therefore strictly speaking they do not have a skeleton