OBJECTIVES•Discuss the five functions of the skeletal system.

•Describe the structure of a bone.

The Skeletal System is the body’s living framework.

206 bones make up the skeleton.

Most of the skeletal system is make up of bones, ligaments, tendons, and cartilage.

Most of the skeletal system is make up of bones, ligaments, tendons, and cartilage.

FUNCTIONS OF THE SKELETAL SYSTEM

•Provides shape and support

•Allows movement

•Protects vital organs and tissues

•Stores certain materials

•Produces blood cells

Axial Skeletonskull

ribsbreastbone

vertebral column

Appendicular Skeleton

shoulders

arms and hands

pelvis/hips

legs and feet

Axial Skeleton

http://www.shockfamily.net/skeleton/RIBS.MOV

Appendicular Skeleton

Development of Bone

Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Structure of Long BoneStructure of Long Bone

Figure 6.3a, c

                                                                              

Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Structure of Long BoneStructure of Long Bone

Figure 6.3a,b

Copyright © 2003 Pearson Education, Inc. publishing as Benjamin Cummings

Microscopic Structure of Bone: Compact BoneMicroscopic Structure of Bone: Compact Bone

Figure 6.5a, b

Ball and Socket A ball and socket joint allows for radial movement in almost any

direction. They are found in the hips and shoulders.

Hinge A hinge joint allows extension and retraction of an appendage.

Pivot Pivot joints allow rotation around an axis. The neck and forearms have

pivot joints. In the neck the occipital bone spins over the top of the axis. In the forearms the radius and ulna twist around each other.

The Skeletal System is the body’s

living framework.

206 bones make up the skeleton.

206 bones make up the skeleton.