Dr / Shimaa Essa
Lecturer of physical therapy , faculty of community,
King Khalid university
Upon successful completion of this lesson you
would be able to:
1- Identify functions of bones.
2- Distinguish between different
Classifications of bones.
3- Name all bones of the human skeleton.
Bone is a calcified osteoid [os = bone
+ oid = form or resemblance] tissue.
Bones function as levers, mineral salts store,
supporters and protectors of the vital organs
of the human body. Bones have several
classifications along with its sub-
classifications, that you need to know all
Functions of Bones
1) Support of the body
2) Protection of soft organs
3) Movement due to attached
4) Storage of minerals and fats
5) Blood cell formation
The Vertebral Column
Consists of 33 Consists of 5 regions:
vertebrae 1. Cervical region
Vertebrae separated (7 vertebrae).
by intervertebral discs 2. Thoracic region
The spine has 4
normal curvatures 3. Lumber region
4. Sacral region
5. Coccygeal region
•7 True ribs are directly
attached to the sternum
(first 7 pairs)
•3 false ribs are joined to
the 7th rib
•2 floating ribs
1. Long- bones are longer than they are
wide, and have a shaft and 2
2. Short- usually square in shape, cube like
3. Flat- flat , curved (cranial bones, Sternum)
4. Irregular- odd shapes (vertebrae, pelvis)
5. Pneumatic - has air filled spaces
e.g. cranial bones.
Structure of a long bone
a. Hollow cylinder of compact bone.
b. Central cavity contains bone
marrow -- production of blood cells.
a. Surface of compact bone.
b. Central areas are spongy
bone -- contain bone marrow.