Transcript Skeletal System By: Greg Daubs Anatomy

Skeletal System
Anatomy
By: Greg Daubs
Functions of Skeletal System
 Provides support and
framework for body
 Protects delicate internal organs
 Also provides attachment sites
for organs
 Bones serve as mineral storage
for Calcium and phosphorus
 Bones are also the site of red
blood cell formation in their
marrow
Divisions of the Skeleton
 Axial skeleton
-Blue bones
Skull
Sternum
Ribs
Vertebral column
 Appendicular Skeleton
-Pink bones
Upper Extremities
Lower Extremities
Shoulder Girdle
Pelvic Girdle
http://www.ck12.org/ck12/images?id=292905
Different Types of Bones
 Long Bones

Longer than they are wide and work as levers.

Ex. Humerus, Tibia, Femur
 Short Bones

Are cube shaped and have a thin layer of compact bone, with inner spongy bone

Ex. Bones of the wrists and ankles
 Flat Bones

Are thin and usually curved. Provide protection for organs.

Ex. Most of the bones of the skull, ribs, sternum
 Irregular Bones

Do not fit in any other category. Shape usually has to do with specific function of the bone.

Ex. Vertabrae, some facial bones
 Sesamoid Bones

Are bones that are embedded in tendons

Ex. Patella (knee cap)
Bone Composition
 Bone is made up of Compact bone and
Spongy bone.
 Compact bone is the hard exterior that is
composed of repeating osteons
 Spongy bone does not have osteons, but has
trabeculae which are basically little beams in the
bone. Also spongy bone cotains red marrow which
gives nutrients to the cells in the bone
Compact Bone
http://www.technion.ac.il/~mdcourse/274203/slides/Skeletal%20Tissues/14-Compact%20bone%20-%20Osteons.jpg
Spongy Bone
http://www.cytochemistry.net/microanatomy/bone/spbone.jpg
Review Quiz
 What part of the
Skeleton is the Skull
apart of?
 Name two functions of
the skeletal System
 Give an example of a
flat bone
 What is the hard part of
a bone?
 Name one example of
an irregular Bone?
 What is Spongy bone
made up of?
 What is the definition of
a short bone?
 What part of the
skeleton is the Humerus
apart of?
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