The Skeletal System
The skeleton has five major
functions:
• Shape and support
• Movement
• Protection of internal organs
• Production of blood cells
• Storage of vitamins and
The backbone or vertebral
column is the center of the
skeleton.
The backbone
is made up
of 26 small
bones called
vertebrae.
Parts of the Bone
• Compact Bone
• Spongy Bone
• Bone Marrow
• Outer Membrane
(Periosteum)
The spaces in
bone contain a
soft connective
tissue called
marrow. The
job of the bone
marrow is to
make blood cells.
Cartilage is a connective tissue
that is more flexible than
bone.
A joint is a
place in the
body where
two bones
come
together.
Immovable joints connect
bones in a way that allow
little or no movement.
Moveable joints allow the body
to make a wide range of
movement.
There are 4 types of moveable
joints:
Ball-and-socket
Hinge
Gliding
Pivot
The bones in movable joints
are held together by a strong
connective tissue called
ligaments.
31. Osteoporosis is a condition
in which the body’s bones
become weak and break
easily.