1bone cells
osteocytes
osteoblasts
osteoclasts
2maintain bone matrix
osteocytes
3build new bone form
osteoblasts
5process of bone formation (occurs in utero)
ossification
6osteoblast's role
build bone
after and OSTEOBLAST becomes surrounder by BONE MATRIX, it becomes an OSTEOCYTE
7where bone formation begins
ossification center
8where bone 1st begins to appear, forms diaphyses
primary ossification center
9forms epiphyses
secondary ossification center
10in infancy and youth, long bones lengthen at _
epiphyseal plate
11in infancy and youth, long bones widen by adding more _
lamella
12in ending of bone growth in length, epiphyseal plate is replaced by an _
epiphyseal line
13removal of existing bone by osteoclasts and deposition of new bone by osteoblasts
bone remodeling
14occurs in all bones, responsible for changes in bone shape, bone repair, adjustment of bone to stress, and calcium ion regulation
bone remodeling
15in bone repair, broken bone cause bleeding and a __ forms
blood clot
16in bone repair, _ forms which is a fibrous network between 2 fragments
callus
17in bone repair, cartilage model forms first, then osteoblasts and osteoclasts enter the callus and will be replaced by bony callus for ___ after injury
4-6 weeks
18in bone repair, __ is slowly remodeled to form compact bone
bony callus
19is a major storage site for calcium
bone
20movement of _ in and out of bone helps determine blood levels of calcium
calcium
21Calcium moves into bone as _ build new bone
osteoblasts
22Calcium moves out of bone as_ break down bone
osteoclasts
23calcium homeostasis is maintained by __ and _
parathyroid hormone and calcitonin
24tissue that makes blood cells
hematopoietic tissue
25location of blood-forming cells
red marrow
26mostly fat
yellow marrow
27location of hematopoietic tissue in newborns
most bones (red marrow)
28location of hematopoietic tissue in adults: red is replaced with __
yellow marrow
29location of hematopoietic tissue in adults: red marrow is mainly in ___
epiphyses of femur and humerus