the skeletal system

Terms in this set (28)

what is the bone function ?
-support soft tissues
-protect vital organs
-store calcium&lipids
-manufacture blood cells
-serves as levers for the muscular system
Bone Histology
...
what is an osteon?
basic structural unit on the bone (supportive column)
what is a central canal?
canals that run lengthwise through the bone containing blood vessels which supply nutrients and oxygen
what is the concentric lamellae?
rings of calcified matrix
what are osteocytes ?
mature bone cells within small spaces called lucunae
what is trabeculae?
meshwork of bony struts filled with marrow
Bone Structure
...
compact bone
dense bone that forms the external portion of all bones
spongy bone
inner layer of bone with spaces filled with bone marrow
marrow
spongy-like material in the cavity of bones that function to produce blood cells(red) or store lipids(yellow)
diaphysis
shaft or long, main, cylindrical portion of the bone
epiphysis
extremities or ends of each bone (where bone marrow is formed)
periosteum
tough, fibrous membrane that surrounds the bone
Types of Bones
...
long bones
greater in length than in width
ex. humerous of arm
short bones
almost as wide as they are long
ex. carpals of wrist
flat bones
thin, platelike
ex. parietal bone of skull
irregular bones
shapes that would not fit in any other categories
ex. vertebrae
how many named bones are in the human body ?
206
Two Bone Groups , what are they?
Axial and Appendicular
what is the axial skeleton composed of ?
80 bones including the skull, vertebrae, sternum, ribs, and hybrid bones
what is it's function?
central framework for attachment, protection of internal organs
what is the appendicular skeleton composed of ?
126 bones including the pectoral girdles plus upper limbs and the pelvic girdles plus lower limbs
what is its function?
allows the body to move and manipulate objects
what is interstitial lamellae?
old osteon
endosteum
lines medullary cavity
osteoblasts
bone cells
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