1. Skeletal system

2. Functions 2. Supports and protects 3. Allows bodily movements
1. Shapes and forms our bodies
2. Supports and protects
3. Allows bodily movements
4. Produces blood for the body (2.6 million RBC produced each second by bone marrow)
5. Serves as a storehouse for minerals like calcium and phosphorus

4. How many named bones are there in the human body?
206

5. Over half of your body’s bones are located:
In the
Hands and Feet

6. The human skeleton is divided into 2 distinct parts:
1.The Axial Skeleton 2.The Appendicular Skeleton
Axial – along “axis” or center of body
Appendicular includes appendages as well as “girdles” that connect appendages to body (shoulder area, hips)

7. Axial

9. Appendicular

10. 4 Types of Bones
1. Long bones: longer than they are wide
2. Short bones: short and cubed shaped
3. Flat bones: broad surfaces for protection of organs
4. Irregular bones: varied shapes sizes and surfaces

11. Another type of bone:
Sesamoid bones: small, flat shaped like a sesame seed (Patella)

12. Long Bone Structure

13. Bone Growth Infant (newborn) has over 300 bones
Cartilage hardens into bone through ossification
Bones also fuse together to form adult 206
Growth plates at end of bones
Cartilage cells divide, new cartilage pushes old cartilage toward middle of bone
As these cartilage cells die, the space they took up is replaced with bone
When bones reach full size, growth plates also convert to bone