BIOC33H3 Lecture : Musculoskeletal System
25 Mar 2013
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Document Summary
The main functions of bone are support, protection of internal organs, voluntary movement, blood cell production, and mineral storage. Cylinder-shaped structural units (haversian systems) fit closely together in compact bone, creating a dense bone structure. Each long bone consists of the epiphysis, diaphysis, and metaphysis: epiphysis, the widened area found at end of a long bone, is composed of cancellous bone. Epiphysis is the location of muscle attachment: diaphysis is the main shaft of the bone. It provides structural support and is composed of compact bone. Marrow is in the center: metaphysis is the flared area of cancellous bone between the epiphysis and the diaphysis. A joint (articulation) is where ends of two bones are in proximity and move in relation to each other. Joints are classified according to degree of movement they allow. Cartilage is a rigid connective tissue in synovial joints that serves as support for soft tissue and provides articular surface for joint movement.
