1. Bone Tissue Osteogenic cells: They differentiate into osteoblasts Osteoblasts: Are the bone forming cells. They form organic components of matrix and help in mineral deposits in bone when a fracture occurs they speed up mitosis to repair

2. Bone Tissue Osteocytes: are osteoblasts that become trapped in the matrix. They reside in cavities called “lacunae”. These cavities are connected by “canaliculi” they act like tunnels to pass nutrients and wastes to and from blood vessels

3. Bone Tissue Osteoclasts: Bone-dissolving cells found the surface of the bone. These cells remove imperfections and release Ca ++ into blood for cellular functions

4. Matrix Matrix is made of 66% hydroxyapatite, calcium carbonate and 33% collagen and proteins. The combination of the two allow bone to be ridged (inorganic) and flexible (organic)

5. Compact Bone Dense bone material, gives bone strength and resists strain Concentric lamellae: layers of matrix concentrically arranged the haversian canal Haversian canal: a tunnel through bone where blood vessels reside Osteon: haversian canal and lamellae

6. Spongy Bone Filled with a lattice of matrix and collagen fibers called “trabeculae” Know for it’s sponge like appearance Red bone marrow most commonly found there Reduces weight of bone and adds flexibility

7. Marrow Red marrow: produces blood cells Yellow marrow: red marrow that becomes yellow as age increases. Yellow marrow is fat in the shaft of the bone can be turned into red marrow in stressful situations