no its just skin what do u think it is
Sharks don't have bones.
There is yellow bone marrow and red bone marrow.
Sharks, rays and ratfish have cartilage but its not sharks. Boney fish (like their name suggests) have bone in the mix - but they still have a lot of cartilage.
it is a bone that has a marrow in the middle of the musle that causes the bone to have a marrow biopsy
Bone marrow.
They are not made up of bone marrow, they just have bone marrow in them.
bone marrow
Marrow is inside of a bone that's why it's called bone Marrow
The bone marrow The bone marrow
leukaemia
bone marrow http://www.answers.com/topic/bone-marrow?cat=health
Autologous bone marrow transplant