1. Skeletal System

2. Bones
The skeletal system is made up of bones and cartilage, which is the framework of our body.
Babies have 300 bones
Adults have 206 bones
We have bones to help hold us up, so that we are not one big blob on the floor

4. What is a bone? A bone is made up of salts, water, and tissue
Inside a bone, there is a thick jelly-like substance that is called bone marrow.
Bone marrow has a major job and that is to make blood cells for our body.

5. Jobs of Bones: Protect your body and give it strength
Protect your organs inside, such as lungs and brain
Provide a support system for your muscles, and allow you to move
Store minerals and make blood cells for your body

6. Super Spine Your spine lets you twist and bend
It holds your body upright
Protects the spinal cord (a large bundle of nerves that sends information from your brain to the rest of your body)
The spine is made of 26 bones in all!
These bones are called vertebrae and each one is shaped like a ring

7. Reliable Ribs
Ribs “act like a cage of bones around your chest”; they protect your heart, lungs, and liver
Your ribs come in pairs
Most people have 12 pairs of ribs, but believe it or not, some people can be born with an extra pair!

8. Skull or Cranium Protects your most important organ: your brain
Some bones protect the brain, while others make up the structure of your face
Cool fact: the smallest bone in our body is found here; the stirrup bone behind your eardrum is .1 to .13 inches!

9. Handy Hands and Flexible Feet
The bones in your hand and feet are flexible and very useful
Each hand has 27 bones (carpals, metacarpals, and phalanges)
Each foot has 26 bones (tarsals, metatarsals, and phalanges)
We use our hands to grasp and write and our feet to stand and walk

10. Bones in our hands & feet

11. Helpful Hips & Long Legs
The hip bone or pelvis helps us stand up straight and move
The femur bone in your thigh is the longest bone in your body
The knee bone is called the patella
Shin bone = tibia, Calf bone = fibula

13. Awesome Arms Each arm is attached to a shoulder blade or scapula
The arm is made up of 3 main bones: The humerus (above your elbow) and the radius and ulna (below your elbow)
The two bones that form the shoulder are the clavicle and scapula

15. Flexible Joints

16. Types of Joints

17. Take Care of Your Bones! Wear a helmet to protect your brain
Wear protective equipment when playing sports
Drink milk to help strengthen those bones
Be active!