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The Skeletal System: Osseous Tissue and Skeletal Structure

20 cards·by jennybakalov
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axial skeleton
consisting of the bones of the skull, vertebral column, sternum, and ribs
appendicular skeleton
consisting of the bones of the limbs and the associated bones that connect the limbs to the trunk at the shoulders and pelvis
osseous tissue
bone; one of the supporting connective tissues
osteocytes
mature bone cells; osteon - bone
lacunae
small chambers occupied by osteocytes; sandwiched between layers of calcified matrix
lamellae
matrix layers; lamella - a thin plate
canaliculi
channels; "little canals"; radiate through the matrix from lacuna to lacuna and toward free surfaces and adjacent blood vessels
osteoblasts
cells that are cuboidal in shape and are found in a single layer on the inner or outer surfaces of a bone; blast - precursor
osteoid
a material that becomes mineralized through a complicated, multistep mechanism
osteogenesis
the production of new bone; gennan - to produce
osteoprogenitor cells
contained in bone tissue; small numbers of flattened or squamous-shaped stem cells; progenitor - ancestor
osteoclasts
large, multinucleate cells found at sites where bone is being removed
osteolysis
erosion process; increases the calcium and phosphate concentrations in body fluids
compact bone
relatively dense and solid
spongy bone/trabecular bone/cancellous bone
forms an open network of struts and plates
medullary (marrow) cavity
contains bone marrow and the stem cells that produce adipocytes and red and white blood cells
bone marrow
a loose connective tissue that may be dominated by adipocytes or by a mixture of mature and immature red and white blood cells
yellow marrow
adipocytes
red marrow
stem cells that produce red and white blood cells
osteoporosis
the erosion of bone tissue; thought to be caused by a combination of decreased osteoblast activity and overactive osteoclast activity