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Spongy bones are not literally spongy. These bones are just extremely porous giving the appearance of looking like spongy material.
Synovial fluid
cartilage
they are exactly spongy bones but spongy bone cells wich are located in long bones.
Bones are light because they are hollow inside and filled primarily with marrow, a spongy substance which produces new red blood cells in large bones.
A spongy tissue in bones is inside the bones and it makes red blood cells.
They are kind of like shock absorbers, and prevent bones from grinding against each other.
Spongy
No If your bones are grinding against each other you really need to go see a bone specialist.
No. Flat bones consist of spongy bone sandwiched between compact bone.
synovial fluid
Bone marrow is the substance that is found at the core of bones, and is either made of fat or red blood cells depending on the type of bone in question. For spongy bone, the marrow is made of red blood cells.