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Skeletal System
vocab associated with the skeletal sys
18
Physiology
11th Grade
10/28/2007

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Term
epiphysis
Definition
head of a long bone
Term
diaphysis
Definition
shaft of a long bone
Term
compact bone
Definition
dense bone containing parallel osteons
Term
spongy bone
Definition
Spongy bone, also known as cancellous bone, is less dense than compact bone and
is composed of a honeycomb-like network of bones called trabeculae
Term
periosteum
Definition
layer that surrounds a bone; outer layer is fibrous, inner cellular
Term
endosteum
Definition
thin layer of connective tissue which lines the surface of
the bony tissue that forms the medullary cavity of long bones
Term
red marrow
Definition
marrow that produces red blood cells; found in the center of long bones
Term
yellow marrow
Definition
marrow that produces fatty tissue
Term
medullary cavity
Definition
space within a bone that contains the marrow
Term
haversian system
Definition
composed of haversian canal, lamellae, canaliculi,lacunae, osteocytes. The structural unit of bone composed of the features listed above.
Term
osteoblasts
Definition
cell that produces the fibers & matrix of bone
Term
epiphyseal cartilage
Definition
cartilage between the epiphysis & diaphysis of a growing bone
Term
osteoclasts
Definition
cell that dissolves the fibers & matrix of bone
Term
epiphyseal plate
Definition
bones grow in length starting at the epiphyseal plate; cartilage plate in children & adolescents
Term
articular cartilage
Definition
cartilage pad that covers the surface of a bone inside a joint cavity
Term
endochondral ossification
Definition
the characteristic formation of bone from cartilage found in most bones, except for the skull, clavicle, and sesamoid bones.
Term
Primary ossification
Definition
the first place where bone formation occurs; usually in the center of the diaphysis
Term
secondary ossification
Definition
formation of bone in the epiphysis
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