Step 2 of Bone Remodeling
Osteoblast
Calcitonin
Step 1 of Bone Remodeling
Hypocalcemia
Osteoclast
Thyroid gland
Parathyroid hormone
Step 4 of Bone Remodeling
Hypercalcemia
Step 3 of Bone Remodeling
Parathyroid
Bone Remodeling - Compact bone replaces woven bone. Internal callus removed. Medullary cavity is restored
Releases parathyroid hormone
Builds bone
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
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
High calcium levels
Low calcium levels
Breaks down bone
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
Releases calcitonin
A hormone that lowers Ca in blood by stimulating bone to be built.
A hormone that increases Ca in the blood by stimulating bone to be broken down.
