Bones Flashcards
(25 cards)
perichondrium
Dense irregular connective tissue surrounds cartilage nutrients
7 bone functions
Architectural support Protection Movement Mineral “bank” calcium and phosphate Blood cell formation Fat storage Hormone (osteocalcin) production
sesamoid bones
form within tendons (patella)
Mitotically active stem cell; one daughter cell remains a stem cell, while the other becomes an osteoblast or bone lining cell
osteogenic cell
check picture in notes of lamellae and everything
yes
Lamallae
Group of hollow tubes
central (haversian) canal
blood vessels and nerve fibers
perforating (Volkmann’s) canal
Bring blood vessels and nerves to marrow (medullary) cavity
osteocytes
in lacunae
Lacunae connected by canaliculi, connects them to central canal
Canaliculi allow (1) osteocytes to communicate and (2) diffusion of nutrients and wastes
endochondral ossification
baby’s bones cartilage to bones
intramembranous ossification
baby’s skull fuses
bone deposition osteoblasts produce
osteoid seam (unmineralized bone matrix)
Wolff’s law
Bone grows or remodels in response to demands (stress) placed on it
nondisplaced fracture
Bone ends retain normal position
displaced fracture
out of normal position
complete fracture
bone broken through entirely
incomplete fracture
bone not broken through entirely
compound (open)
penetrates skin
simple (closed)
does not penetrate skin
comminuted
3 or more pieces
compression
bone is crushed
epiphyseal fracture
along epiphyseal plate
depression
skull pressed inward
rickets
caused by insufficient calcification of bone
