Skeletal System

• The skeletal system is made up of all the bones in our body, about 206 of them!

Functions of the Skeletal System:

1. Support
2. Movement
3. Mineral and fat storage.
4. Protection
5. Hematopoeisis

There are four main bone types:

1. Long bones- i.e. femur, tibia, fibula, humerus, radius, ulna, and phalanges.
2. Short bones- i.e. wrist bones (carpals), and ankle bones (tarsals).
3. Flat bones- i.e. cranial bones, ribs, sternum, and scapula.
4. Irregular bones- i.e. vertebrae and facial bones.

There are also two bone textures: compact and spongy.

Bone Formation = Ossification.

1. Invasion of the periosteum by a vascular bud at the primary ossification site.
2. Formation of the diaphyseal collar.
3. Cavitation of the marrow cavity.
4. Osteoblast/Osteoclast progression.
5. Secondary ossification sites.
6. Formation of the epiphyseal plate/line.

Links!

Skeletal Anatomy

• http://www.bio.psu.edu/faculty/strauss/anatomy/skel/skeletal.htm
• http://www.shockfamily.net/skeleton/

Skull Quiz

• http://www.gwc.maricopa.edu/class/bio201/skull/antskul.htm

Vetebral Anatomy

• http://www.gwc.maricopa.edu/class/bio201/vert/vertut.htm