collagen
Hydroxylapatite is the mineral substance in bone. It is a calcium compound.
Bone Cells, Collagen Fibers, Ground Substance
bone marrow :)
The weight and density of a persons bone structure determines the body frame.
bone marrow
They are vertebrates. Invertebrates are animals lacking a back-bone
Red bone marrow.
Bone
Bone marrow.
Cartilage
A bone related substance that is in the respiratory system is hyaline cartilage, especially in the trachea and bronchi.
well bone marrow is a substance that is inside of the bone, so there for bone marrow is part of the skeletal system.