Osseous matters are substances that relate to bones. There are various synonyms for this term, including the words bone tissue, skeletal material, and bone matter. Bone matrix refers to the mineralized tissue that forms the bone, while osteoid pertains to the non-mineralized part of the bone. Meanwhile, bone marrow is the spongy tissue within bones that is responsible for producing blood cells. Lastly, bone density refers to the amount of mineral in the bone, which can be measured to diagnose conditions like osteoporosis. All of these terms are related to the structure and composition of bones, highlighting their importance in the human body's structure and function.