Fundamentals of Anatomy and Physiology

The Skeletal System 139

Skeletal System

has a specific

Structure

includes

performs specific

enables Functions

include

(^) Mineral Blood (^)
Bones^ Joints^ Cartilages^ Support^ Movement^ Protection^ storage^ cell^
formation^
have^ to bones atbound^ to bones atbound^ may provide^
regulated (^)
enable bones to provide for (^)
Control of (^)
Medullary (^) Cells Intercellular (^) strength and rigidity needed for extracellular (^)
cavity material fluid levels (^)
of calcium (^)
and phosphorus (^)
filled with secrete
Bone Collagenous
marrow fibers
(^)
strong rigid
due to due to
Calcium
and
phosphorus
deposited
on
added to or released from
intercellular material for
(^) ®
Learning
red bone marrow functions in
Cengage ©
concept Map 7- 1 Skeletal System.
Deposition of Bone
Bone develops from spindle-shaped cells called osteo-
blasts that develop from undifferentiated bone cells called
osteoprogenitor (oss-tee-oh-pro-JEN-ih-tohr) cells
(Figure 7-1). These osteoblasts are formed beneath
the fibrovascular membrane that covers a bone called the
periosteum (pair-ee-AHS-tee-um) (Figure 7-2). These
osteoblasts are also found in the endosteum (en-DOS-
tee-um), which lines the medullary cavity. Depo-sition of
bone is controlled by the amount of strain or pressure on
the bone. The more strain, the greater the