Skeletal (Gross Anatomy) Flashcards
osteocyte
mature bone cell that monitors and maintains the mineralized bone matrix
osteoclast
bone-resorbing cell
skeletal cartilage purpose
- reduce friction b/w bones
- absorbs shocks
what has no blood vessels or nerves
skeletal cartilage
hyaline cartilage
- most abundant
- COLLAGEN fibers only
hyaline cartilage location
respiratory (connects ribs and sternum), nasal cartilage
elastic cartilage
elastic and collagen fibers
elastic cartilage location
epiglottis, external ears
axial skeleton
skull, vertebral column, rib cage
appendicular skeleton
appendages and hip bones
fibrocartilage
- thick fibers
- great tensile strength
fibrocartilage location
vertebral discs, knee menisci
long bone example
limbs, wrist, ankle bones
short bone example
sesamoid bones
sesamoid bones
small bones embedded in muscle or tendon
flat bone example
sternum, scapulae, most skull bones
irregular bone example
vertebrae, coxal (pelvic) bones
functions
support, protection, movement, stores minerals and growth factors and fat, makes hormones
hematopoiesis
blood cell formation in certain red marrow bone cavities
what hormone do bones produce
osteocalcin
- regulates bone formation
- protects against obesity, diabetes mellitus, and glucose intolerance
what tissue does the skeletal system mainly contain
osseous tissue
are bones organs?
yes
compact bone
dense outer layer; smooth and solid
spongy bone/trabeculae
honeycomb of internal flat pieces
short, irregular, and flat bone structure
- thin plates of spongy covered by compact
- plates sandwiched between C.T. membranes
- no shaft or epiphyses
- yes marrow, no marrow cavities
periosteum
- double layered membrane
- dense irregular fibrous C.T.
- anchoring place for tendons/ligaments
- provides blood and nerves to bone
endosteum
inner layers of C.T. membranes
epiphyses
- ends of bones
- inside spongy outside compact
diaphysis
long shaft, compact bone surrounds medullary cavity
epiphyseal line
- separates diaphysis and epiphyses
- remnant of childhood growth hormone
articular cartilage
lines bony tissue of joints
sharpey’s fibers
secures the periosteum to inner bone matrix
red marrow location
cavities of spongy bone
trabecular cavities
highly porous inner bone areas
what can yellow marrow convert to if needed?
red marrow
medullary cavity
inside bone structures where only spongy bone is