ANT 3520 Lecture Notes - Lecture 2: Ossification Center, Haversian Canal, Bone
17 Feb 2016
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Document Summary
Is it human: age reflects growth and development, long bones are composed of cortical bone and spongy bone. Solid bone found in the walls of bone shafts and external bone surfaces. Porous, lightweight bone that distributes stresses on bone and houses bone marrow. Also in smaller bones: bone marrow is where red and white blood cells and platelets are produced. Adipocytes contain fat in the marrow cavity: all bones start out as a single mesenchymal stem cell. Start from the middle and grow outward. Blood vessels invade, bringing osteoblasts: bone develops from ossification center in membranous tissues. Growth centers develop final size and shape over the years. Long bone ossification starts at the shaft and moves toward the ends: haversian system- osteons. Basic structural and functional unit of compact bone. Canaliculi- canals that run between cells and blood supply. Haversian canal- holds the blood supply: osteocytes- mature bone cells that are responsible for maintaining bone tissues.
