Skeletal Tissue Terms

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Cancellous bone
spongy bone; composed of a network of bony struts
haversian system
basic histological unit of bone
lacuna
small pit or cavity in bone in which an osteocyte lives
lamella
circular structure of bone tissue around a central canal
perforating canal (Volkman's canal)
passageway in compact bone that runs at right angles to the axes of the osteons; between the periosteum and endosteum
endosteum
incomplete cellular lining (medullary) found on the inner surface of bone medullary cavity
medullary cavity
space within bone that contains marrow
articular caartilage
cartilage pad that covers the surface of a bone inside a joint cavity
osteoporosis
reduction in bone mass and strength sufficient to compromise normal bone function.
lordosis
exaggeration of the lumbar curvature
kyphosis
exaggerated thoracic curvature
scoliosis
abnormal' exaggerated lateral curvature of the spine
vertebrochondral ribs
ribs 1-7' true ribs connected to the sternum by individual cartilaginous bars