Bones can produce blood, which is made in the marrow, or the squishy stuff inside your bones
bone marrow
bones
white cells are produce in the bones
osteoblast
Bones produce a liquid called bone marrow, which is a soft, jelly-like substance found in the cavities of bones. Bone marrow is responsible for producing blood cells and storing fat within the body.
They can produce high calcium.
Ligaments
no
Animals do not produce bones, only skeletons do (unless you are using a mod I do not know of).
Tendons attach muscles to bones, while ligaments attach bones to other bones.
the bone marrow
there aren't none the hollow bones don't break as easily and they are able to produce bone marrow inside.