1. The Skeletal System The skeletal system is the structure of your body. The skeleton is the center of your body.

2. What The Skeletal System Made Of The skeletal system is a system where bones are connected to make a skeleton.

3. How Many Bones Are In Your Body? Each adult skeleton has 20 6 bones in your body! 2 6 bones in each of your feet and 2 7 bones in your hands! Your skull has 2 3 bones!

4. Do blood vessels go through your bones? Blood vessels run through the bones because the bone cells need to have water, food, and oxygen. Blood vessels also run through the bones of your body because there is bone marrow in your bones. Bone marrow creates the blood cells in your vessels.

5. Types Of Bones There are three types of bones; the hollow bones, the flat ones, and the solid bones. Solid bones are bones that are not flat and aren’t hollow. They are found in your arms, legs, feet, and hands. Solid bones carry the most bone marrow out of the types of bones. Flat bones are bones that aren’t hollow and are not round. Flat bones don’t carry a lot of bone marrow. Hollow bones don’t have any bone marrow in them. Hollow bones are found in your head.

6. Inside Your Bones Inside your bones is were blood cells are created. The tissue is called bone marrow. Bone marrow is a soft tissue that can reproduce blood cells.

7. Bone Connections Bones are connected by ligaments and joints. There is two types of joints: Ball and socket joints and hinge joints. Ligaments are small strings of cells that connect different bones.

8. Bone Protection Certain bones in your body protect organs. Your skull protects you brain and your rib cage protects your heart and lungs.

9. Your Cranium Your head has 22 bones in the skull and three bones in each of your ears for a total of 28 bones. Only 6 of those bones move!

10. Your Ear Bones There are three bones that are in your ear. The bones are called the anvil, hammer, and stirrup. The the hammer strikes the anvil which creates a sound that travels to the stirrup and creates a sound that travels to your ear drum. That is how sound in your ear is created.

11. Your Shoulder Bones Your shoulders are made up of your clavicle (collarbone), Vertebrae (backbones), and your Scapula (shoulder blades).

12. Your Arm Bones Your arm bones help support your arm muscles. It takes two muscles to move your arm up and down. The bones are the humorous, ulna, and radius.

13. Your Hand Bones There are 1 6 bones in your hand. There is 6 carpals, 5 metacarpals, and 5 phalanges.

14. Your Rib Cage 37 bones make up your rib cage. There are 24 ribs, 12 vertebrae, and a sternum.

15. Your Leg Bones The leg bones help you walk, swim, kick, and run. Without your leg bones, you wouldn’t be able to stand.

16. Connections The Skeletal system interlinks with three other systems. The systems are the Nervous system, Muscular system, and the Immune system.

17. Fun Facts Did you know that your radius is the most common bone that gets broken? Did you know that it takes six muscles to move your arm straight up? Did you know that you have 207 bones as a baby and 206 as a adult.

18. About The Author… Zachary Chambers currently lives in Arden Park, Sacramento, California. His favorite food is sushi and loves to pick apart butterflies. He is currently training to be an entomologist. An entomologists are people that study insects.