Relier Pairs 1.2.7 Bone RemodelingVersion en ligne Calcium feedback and steps of bone remodeling par Laura Roy 1 Calcitonin 2 Parathyroid 3 Osteoclast 4 Step 1 of Bone Remodeling 5 Step 3 of Bone Remodeling 6 Parathyroid hormone 7 Hypocalcemia 8 Osteoblast 9 Hypercalcemia 10 Step 2 of Bone Remodeling 11 Step 4 of Bone Remodeling 12 Thyroid gland Breaks down bone Low calcium levels Builds bone Releases calcitonin 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 lowers Ca in blood by stimulating bone to be built. 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 Releases parathyroid hormone A hormone that increases Ca in the blood by stimulating bone to be broken down. High calcium levels Bone Remodeling - Compact bone replaces woven bone. Internal callus removed. Medullary cavity is restored 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
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