Anatomy: Ch. 6 Skeletal System
scoliosis
an abnormal lateral curvature of the spine is termed
appositional growth
an increase in the diameter of growing bone is termed
intramembranous ossification
as the bone enlarges, osteoclasts break down some of the spongy bone and create a marrow cavity. This occurs in:
osteoclasts
bone cells capable of dissolving the bony matrix are called
long bones
bones of the limbs are
ossification
during this process, an existing tissue is replaced with bone
scapula
part of the appendicular skeleton
ribs
part of the axial skeleton
maintaining the normal concentrations of calcium and phosphate ions in body fluids
Regulatory functions of the skeletal system include:
vitamin D3
Rickets is a condition marked by a softening and bending of bones that occurs in growing children as a result of this deficiency
depress calcium levels in body fluids
The hormone calcitonin functions to
an epiphyseal plate
This presence strongly indicates that the long bone is still growing
abduction
a movement away from the longitudinal axis of the body in the frontal plane
adduction
a movement toward the longitudinal axis of the body in the frontal plane
calcium phosphate
accounts for almost 2/3 of the mass of bone tissue
menisci
fibrous cartilage discs that act as shock absorbers in joints are called
osteons
found only in compact bone
12
humans have __ pairs of ribs
osteoblasts
immature, active bone cells that produce new bone matrix are termed
the bones of the pelvis
includes portions of both axial and appendicular elements
circumduction
moving the arm in a loop is an example of which angular movement
sutures
skull bones are joined by tight connections called
trabeculae
spongy bone is made up of a network of bony rods or plates called
short
tarsal bones are classified as __ bones
7
the vertebral column contains __ cervical vertebrae
5
the vertebral column contains __ lumbar vertebrae
cervical
the atlas is classified as a __ vertebra.
mandible
the bone that makes up the lower jaw
metacarpals
the bones that form the palms of the hands are the
periosteum
the connective tissue covering the outer surface of a bone
movement
the primary function of __ is exemplified when bones function as levers
calcification
the process of depositing calcium salts into a tissue other than bone
diaphysis
the shaft of a long bone is called the
blood cell production
this primary function of the skeletal system applies to the role of bone marrow
costal cartilages
true ribs are directly connected to the sternum by __
ball and socket
which joint can perform rotation movements
shoulder
which joint permits the greatest range of motion in any joint in the body
