It’s all about the bones!!! Skeletal System It’s all about the bones!!! Information taken from: http://e-pagination.com/teaching/07_Human_Body_Systems-Functions_I_Force-Motion.htm

1. FYI 5 Cool Facts about the Skeletal System 20% of your body weight is bone Do the math (Your body weight) X .20= the weight of your bones There are 30 bones in your skull You have 206 bones More than ½ of these are in your hands and feet Your largest bone is your femur and your smallest bone is in your Ear!

2. Functions of the Skeletal System Provides shape and support Enables you to move (works with muscles) Protects internal organs Produces blood cells Stores materials for future use (HOMEOSTASIS ALERT!)

3. Shape and Support Provides Shape and Support for Body Shape depends on the organ/organ system it needs to protect Example: Skull thick and round to cover brain!

4. Protects Internal Organs Protect your internal organs Organs can be easily squished Example: Heart and breastbone Lungs and rib cage Spinal cord and spine

5. Produces Blood Cells Produces substances our body needs Blood cells (white and red) made in the marrow of the long bones of the arms and legs Bone Marrow

6. Stores Materials for Future Use Compact bone – where blood vessels are and minerals are stored Stores substances until your body needs them Stores calcium and phosphorus Homeostasis alert! Bones release small amounts of Calcium and phosphorus into body when body is running low!

7. Enables you to move Muscles work with bones to make you move

8. Joints of the Skeletal System The bones of the skeletal system are connected at areas called joints Where two or more bones come together The body has moveable and immoveable joints

9. Immovable Joints Skull Ribs Examples: Joints in the body where there is little or no movements Examples: Skull Ribs

10. Movable Joints Joints that allow movement. Most of the joints in the body are movable. There are 4 types of movable joints: Hinge Ball and Socket Gliding Pivot

11. Movable Joints of the Skeletal System Ball and Socket Joints Allows fullest range of motion Examples: shoulder and hip

12. Movable Joints of the Skeletal System Pivot Joints Allows one bones to rotate around another Example: neck vertebrae

13. Movable Joints of the Skeletal System Hinge Joints Allows forward and backward motion Example: knee and elbow

14. Movable Joints of the Skeletal System Gliding Joints Allows one bone to slide over another Example: wrist and ankle

15. Joints of the Skeletal System Bones in movable joints are held together by strong connective tissue called ligaments. Ligaments are like the “tape” that holds bones together.

CPS Quiz Skeletal System

1. What is a place in the body called where two bones come together? Connections Hinge Joint

2. Which type of joint allows the bone to swing in a full circle? hinge Ball and socket Pivot gliding

3. Do bones make blood cells? A. Yes B. No

Cartilage Tendon ligament 4. What is the name of the tissue that holds bones together at a joint? Cartilage Tendon ligament

5. What do your bones store (but not produce) that your body needs? Phosphorus White blood cells Red blood cells