1. The Skeletal System
No bones about it!

2. 5 Functions of the Skeletal System…
Provides shape and supports for body
Allows for movement
Protects internal organs
Stores materials (calcium and lipids)
Blood cell production (bone marrow)

3. The skeletal system is made up of:
Bone and the joints that connect them together
Bone: Type of connective tissue that is hard and calcified
Joint: a place where two or more bones come together (can be moveable or immoveable)

4. Major Types of Joints

6. Major Types of Moveable Joints:

7. Immoveable/Fixed Joints…
Example: skull, pelvis

8. How many bones are there in the adult human?
206
But… humans are born with >270 bones and some fuse together as an infant to become 206 bones.

9. The Human Skeleton -Major Bones

10. The Human Skeleton
-Major Bones

11. Two Main Types of Bone:
Compact Bone – Solid, dense. Contains blood vessels and nerves. Strong, stores calcium.
Spongy Bone – Numerous spaces and cavities, lightweight.
*both can contain bone marrow.
Red Bone Marrow – produces blood cells (red blood cells, white blood cells, and platelets).
Yellow Bone Marrow – stores fats (lipids)

12. Long Bone

13. Other materials associated with skeletal system:
Cartilage: Soft connective tissue. Some develops into bone after birth. Some remains (nose, ears). Bones have cartilage at the ends where they meet a moveable joint
Ligaments: connective tissue that connects bone to bone
Tendons: connective tissue that connects muscle to bone (allows for movement)

14. Cool Bone Videos… Skeletal System Rap by Zac Lewis
Human Skeletal System
The Bone Dance
Name Those Bones

15. Fun Skeletal System Facts:
You were born without a patella
Humans and giraffes have the same number of bones in their neck
The longest bone in your body is your femur
The smallest bone in your body is the stapes, also called the stirrup (hardly larger than a grain of rice)
The largest bone is the pelvis, which is made of 6 bones firmly joined together
The only bone not connected to another is the hyoid, at the base of the tongue
There are 26 bones in the foot
The skeleton had a lot more cartilage when born, to be softer and allow for an easier birth. Then the cartilage hardens and forms bone.
You are born will all red bone marrow (produces blood cells), but with age, about half of it turns to yellow bone marrow (stores fats)