Bone marrow, more specifically yellow bone marrow.
The compact bone is the outer part of the bone, and on the inside is the spongy bone. The spongy bone has small spaces which are filled with red bone marrow and some fat.
spongy bone
Spongy bone
they have no bones
they have no bones
spongy bone
a marrow
Bursa
As the names suggest, compact bone is solid-looking, and forms the outer layers of all bone (and the shafts in long bones). Spongy bone looks like sponge, with small holes, and is found on the inside of bones and the expanded heads of long bones. As the names suggest, spongy bone is softer than the solid, compact bone. With the naked eye, you can see that the compact bone is smooth and located around the outside of a cross-section of bone. Spongy bone, on the other hand, is located on the inside and is very porous, like a sponge.
As the names suggest, compact bone is solid-looking, and forms the outer layers of all bone (and the shafts in long bones). Spongy bone looks like sponge, with small holes, and is found on the inside of bones and the expanded heads of long bones. As the names suggest, spongy bone is softer than the solid, compact bone. With the naked eye, you can see that the compact bone is smooth and located around the outside of a cross-section of bone. Spongy bone, on the other hand, is located on the inside and is very porous, like a sponge.
OHH THATS EASY... THEY DONT HAVE ANY..... :) Of course they have bones go on a scientific website it might tell you
Octopuses belong to a family of animals that has no bones. These animals don't have any exoskeleton like a bug or a vertebrae like a mammal. Rather, they have very tight skin & muscle to replace bones, so they can slip through cracks too small for an animal with bones.