bone remodeling occurs steps in bone repair (1) a hematoma forms fibrocartilage callus forms bony callus forms bone remodeling occurs 1. These cytoplasmic processes are joined together by gap junctions canaliculi perforating (volkmann's canal) lie at right angles to the long axis of the bone and connect the blood and nerve supply of the medullary cavity to the central canals osteocyte in lacuna perforating (volkmann's canal) 1. The radiating processes of the osteocytes (called filopodia) project into these canals. compact bone surrounds spongey bone and medullary cavity perforating fibers matrix of connective tissue consisting of bundles of strong predominantly type I collagen fibres connecting periosteum to bone perforating fibers central (haversian) canal canal that contains small blood vessels and nerve fibers that serve the osteon's cells central (haversian) canal osteon structural unit of compact bone osteon circumferencial lamellae extend around the entire circumference of the diaphysis and resist twisting of the long bone circumferencial lamellae lamellae compact bone tissue that surround a central canal, the haversian canal lamellae lacunae spider shapes osteocytes occupy _ at the junctions of lamellae lacunae canaliculi microscopic canals between the lacunae of ossified bone. It is found in the ends of long bones and in the bones of the pelvis, ribs, vertebrae, and skull.

Periosteum white double layered membrane that covers the external surface of the entire bone (except the joint surfaces) periosteum nutrient foramen (openings) for the entrance of blood-vessels which leads into the medullary cavity endosteum delicate connective tissue membrane that covers the internal bone surfaces endosteum articular cartilage covers the ends of most bones at moveable joints articular cartilage costal cartilage connect the ribs to the sternum fibrocartilage highly compressible with great tensile strength, occur in sites that are subjected to both pressure and stretch spongey bone very important for producing blood cells.

Bone gap chapter summary