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25 Cards in this Set

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  • Back
skeletal components
bones and cartialage that form framework which gives particular shape
articulation
joints,points where bones attach to each other
skeletal function
support soft tissue, maintain form and posture, protect delicate structures, spinal cord, lungs, heart and major blood vessels in thoracic cavity
bones
organs of osseous tissue, membranes and marrow
bone function
serve as levers to which muscles are attached, ligaments keep joints together, storage area for mineral salts and fat, hematopoesis in red marrow
diaphysis
shaft or long portion of a bone
metaphysis
narrow region of long bone where diaphysis and epiphysis meet
epiphyses
ends of long bones, proximal and distal
articular cartilage
thin layer of hyaline cartilage covering the epiphyses
periosteum
membrane covering bone's surface, outer fibrous layer, inner osteogenic layer with osteoproginator cells and osteoblasts, collagenous bundles, essential for bone growth, repair and nourishment, point of attachemnt
osteoblasts
cells that lay down bone
collagenous bundles
Sharpey's fibers, penterate bone and connect osteogenic layer to bone
medullary cavity
marrow cavity, in diaphysis holds yellow marrow
endosteum
membrane that lines marrow cavity
osteoclasts
cells that break down bone, possess lysosomes
spongy bone
tabecualr or cancellous bone, lattice with many spaces with red marrow, in epiphyses, short flat irregular bones, inner layer of diaphyses
structure of spongy bone
trabecular, irregualr thin plates with osteocytes embedded in lacunae, osteoblasts whihc make bone matrix, red marrow in spaces
compact bone
most of bone tissue in long bones, thin layer in epiphyses, thick in diaphysis, fewer marrow spaces, many concentric rings called osteons, interstitial lamellae
osteons
Haversian systems
perforating canals
Volkmann's canals, horizontally oriented, contain blood vessels & nerves which originate in the periosteum
central canal
Haversian canal, vertically oriented with blood vessels and nerves
lamellae
concentric rings of matrix
lacunae
space between osteocytes
canaliculi
little canals that connect one lacunae to another
interstitial lamellae
found around osteons, fragments of older osteons