bones Flashcards
list function and purposes of the skeletal system.
framework attachment tissues/muscles, protection of organs, movement, mineral homeostasis for Ca and P, Fat storage in yellow bone marrow, RBC,WBC production in red bone marrow
the long shaft of the bone is covered by compact bone and is called.
diaphysis
plasty
repair
porosis
holey
blast
build
clast
break
ossi/o
bone
arthr/o
joint
my/o
muscle
oste/o
bone
syn
together
peri
around
intra
within
trophy
grow
algia
pain
dys
difficult
the outer covering of bone is the
periosteum
the part of the bone that contains the epiphseal plate is
metaphysis
the inner lining of bone is the -
and the outer lining is-
endosteum
periosteum
the part of the bone which contains the yellow marrow, vessels and nerves is
diaphysis
the part of bone contains red bone marrow and connects to the growth plate
epiphysis
this part of bone contains nerve ENDINGS and is made of dense irregular connective tissue
periosteum
this part of bone is mostly made of spongy bone
epiphysis
hyaline cartilage at the ends of the bone is known as - cartilage
articular
this part of the bone contains stem cells, osteoblasts and osteoclasts
endosteum
bone is mostly made up of what four things?
water,
collagen protien, minerals, cells
mature bone cells
osteocytes
osteogenic cells
stem cells
secrete collagen and minerals
osteoblasts
release acids to resorpt bone
osteoclasts
located in the endosteum
stem cells
osteoblasts
osteoclasts
calcified rings around canal
lamellae
contains osteocytes
lacunae
structural unit of compact bone
osteon
routes for nutrients and wastes
canaliculi
contains vessels and Nerves
canals
structural unit of spongy bone
trabeculae
paths leading out from lucunae
canaliculi
red bone marrow
what is its purpose and where is it found?
make blood cells (RBC and WBC)
located in epiphysis of long bones and also spongy bones (ribs,skull,sternum, hip bones)
yellow bone marrow
what is its purpose and where is it found?
nutrition- storage of fat in diaphysis (medullary cavity)
spongy bone: what are two purposes? what 4 bones contain a lot of it
reduce bone weight, handle mutidirectional stresses, red bone marrow skull, sternum, ribs, pelvis
nutrient Forman: where is it located and what is it for?
hole in diaphysis of bone, entry point of vessels(nerve, artery, vein, lymph)
nerve endings:
where are they located in bone ? why?
periosteum- pain sensors on outside of bone for protection- closer to point of potential damage
what is the definition of ossification ?
making bone
what is the structural unit of spongy bone called
trabeculae
what is the structural unit of compact bone called?
osteon
primary ossification: where does it occur?
diaphysis (forms medullary cavity)
what happens during primary ossification ?
cartilage-calcification - spongy bone(trabeculae)-osteo clasts- resorpt cartilage - medullary cavity
secondary ossification. where does it occur?
epiphysis (to form spongy bone and red bone marrow)
what happens during secondary ossification ?
cartilage - calcification - spongy bone -calcification -compact bone and periosteum also forms hyaline cartilage - articular cartilage
epiphyseal plate/line where is it located ? what is it for?
located in the metaphysis of long bones. this is where bone length increases in long bones
define calcification. list two examples.
adding calcium and other minerals to create bone.
calcium is added to cartilage to make spongy bone
calcium is added to spongy bone to make compact bone.
bone composition
mineral %70 bone strength
collagen 25% bone flexibility
water 5%
vitamins
vitamins D absorb calcium from intestines
B12,A,C, K stimulate collagen and osteoblasts activity
hormones
parathyroid and calcitonin regulate blood calcium levels.
remodeling
replace old bone tissue with new.
resorption: osteoclasts release acids, dissolving bone
deposition: osteoblasts add new minerals and collagen to bone.
rate: spongy bone 20% replace per year. compact bone:5% per year. distal femur bone replaced every 4 months. center shaft femur never
adaptation to environment
muscle tension or “pull” of gravity on tendon and ligaments.
stimulate osteoblasts activity Increase and maintain bone density.
inactivity- bone rest or lack
bone loss=1% per week
ligament attach bone to …
bone
tendon attach bone to
muscle
bursae
pocket bag of water in joint, reduce friction
open (compound)
skin broken
closed (simple)
skin not broken
comminuted
crushed bone 3 or more pieces.
green stick
partial fracture in children, one side broken, other side bent
stress fractures
microscopic fissure, caused by osteoporosis or repeated activity (running)
compression
common vertebral fracture in elderly
associated with osteoporosis