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