Muscles
This is the number of muscles that your body must use to create a smile.
What is 17?
These joints, which don't move at all, can be found in your skull.
What are fixed joints?
These bones protect organs like the heart, lungs and liver etc.
What are the ribs?
Milk is a good source of this mineral which helps make our bones strong.
What is calcium?
The "bones" in sharks are not actually bones at all, but are made of this instead.
What is cartilage?
These anchor muscles to the bones.
What are tendons?
Your jaw is an excellent example of this type of joint that can only move in one direction.
What is a hinge joint?
These are made inside your bones.
What are blood cells?
This is the number of bones in an adult.
What is 200?
Bone is stronger than this substance found in skyscrapers.
What is steel?
These are the types of muscles you can control.
What are skeletal muscles?
This joint allows movement in all directions.
What is a ball-and-socket joint?
These anchor muscles to the bones.
What are tendons?
They are the strongest bones in the skeleton.
What are teeth?
This creature has more bones in its neck than a giraffe.
What is a sparrow?
When muscles get shorter to help us move.
What is contracting?
Our spine is an example of this kind of joint.
What is a sliding joint?
Soft, squishy pieces of cartilage between the bones in your spine to help you move your back.
What are discs?
You have 33 of these stacked on top of one another in your back.
What are vertebrae?
When cracking your knuckles, you are actually pulling your bones apart and creating these.
What are air bubbles?
These are tiny tissues like rubber bands and it takes thousands of them to make up each muscle in your body.
What are fibers?
This joint is found in the thumb and allows movement in two directions.
What is a saddle joint?
What are impact and shock?
This is the hard membrane on the outside of a bone.
What is the periosteum?
The largest bone ever found was 8.2 feet long, and belonged to this dinosaur.
What was the Argentinosaurus?