Osteoblast
Step 3 of Bone Remodeling
Step 4 of Bone Remodeling
Hypocalcemia
Parathyroid hormone
Thyroid gland
Step 2 of Bone Remodeling
Hypercalcemia
Calcitonin
Parathyroid
Osteoclast
Step 1 of Bone Remodeling
High calcium levels
Low calcium levels
Builds bone
Breaks down bone
Releases parathyroid hormone
Bony Callus Formation. Takes several weeks to months. Osteoclasts break down fibrous cartilage Osteoblasts lay new bone matrix, made of osteocytes. Bone is MOSTLY healed at this stage
Fibrocartilaginous callus formation. Connective tissue stem cells & capillary blood vessels penetrate. Phagocytes clear away junk. Cartilage and blood vessels start to form to create new bone
A hormone that increases Ca in the blood by stimulating bone to be broken down.
A hematoma is a “blood tumor” that forms at the site of the break This painful, swollen area fills with blood from the broken blood vessels
A hormone that lowers Ca in blood by stimulating bone to be built.
Releases calcitonin
Bone Remodeling - Compact bone replaces woven bone. Internal callus removed. Medullary cavity is restored
