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