Copyright Goodheart-Willcox Co., Inc. Chapter 5 The Skeletal System 127 Periosteum Cortical bone Blood vessel Haversian canal Perforating (Volkmann’s) canal B Magnified view A Pie-shaped section Spongy bone Osteons (Haversian system) Blood vessel continues into medullary cavity containing marrow Lamellae Lamella Osteocyte Canaliculus Lacuna Haversian canal © Body Scientific International Figure 5.7 A—A microscopic view of the inside of bone tissue. B—An even more magnified view of the diaphysis. SECTION 5.1 REVIEW Mini-Glossary appositional growth growth accomplished by the addition of new layers to those previously formed articular cartilage dense, white connective tissue that covers the articulating surfaces of bones at joints bone marrow material with a rich blood supply found within the medullary cavity of long bones yellow marrow stores fat, and red marrow is active in producing blood cells cortical bone dense, solid bone that covers the outer surface of all bones and is the main form of bone tissue in the long bones diaphysis the shaft of a long bone epiphysis the bulbous end of a long bone Haversian canals major passageways running in the direction of the length of long bones, providing paths for blood vessels Haversian system structural unit that includes a single Haversian canal along with its multiple canaliculi, which branch out to join with lacunae, forming a comprehensive transportation matrix for supplying nutrients and removing waste products also known as an osteon hematopoiesis process of blood cell formation medullary cavity central hollow area found in long bones osteocytes mature bone cells osteon a Haversian system perforating (Volkmann’s) canals large canals that connect the Haversian canals oriented across bones and perpendicular to Haversian canals periosteum fibrous connective tissue membrane that surrounds and protects the shaft (diaphysis) of long bones (continued)