Bones and Muscles

What do we call muscles that work automatically and that you don't have to think about controlling?

What is made up of 206 different bones and supports your body?

What bones protect your heart and lungs?

What do muscles do when they stop contracting and become longer again?

What is made of millions of long cells and helps your body move?

What strong fibre joins a voluntary muscle to a bone?

What do we call the place where two bones meet?

What flexible material inside some joints stops the ends of bones from touching?

What is the largest bone in the human body?

What part of the skeleton protects your brain?

What muscle in your upper arm contracts when you bend your arm?

What is the soft, red material inside some bones where new red blood cells are made?

What do we call muscles that you can contract and relax whenever you want?