Bone Basics Flashcards
what are Long Bones
Corticol (Compact Bones)
what is the middle of the bone called
Diaphysis
what is the end of the bone called
epiphysis
(can be proximal or distal)
where does the middle of the bone meet the end of the bone
metaphyis
(can be proximal or distal)
where is bone marrow found
in the medullary cavity
what is the outer sheath of the bone and what is its function?
Periosteum
supplies bone with blood, nerves, cells
which cell in bones are stem cells
osteogenic
what cells found in bones resorb bone
osteoclasts
what is the functions of osteoblasts
forms bone matrix
what cells found in bones maintains bone tissue
osteocytes
what are Haversian canals
grooves made as osteoclasts eat away at bone and osteocytes refill it (in bone remodelling)
what are trabeculae
bundle of fibres in the Cancellous (spongy) region of bone
define bone remodelling
continuous deposition and resorption of bone
What is Wolfs law?
bones orient themselves to resist forces acted upon them due to the presence of tension lines
what are some functions of bone
support
levers for movement
protection
mineral homeostasis
haemoatopoesis
what is compact bone filled with
mixture of organic (collagen) and inorganic substances (minerals)
how may bones be classified
cranial - postcranial
axial - appendicular
endochondral - intramembranus
long, short, flat, sesamoid, irregular
what is the term for growth plates
physes
where are sesamoid bones found
near tendons + ligaments + joints
define apophysis
protuberance developed from independent ossification centres
define foramen
opening
define fossa
shallow depression or hollow
how are dorsal skull bones formed
endochondrally
how are ventral skull bones formed
endochondrally