Do bones start growing before you are born?

What is the largest bone in your body?

What is in milk that makes your bones strong?

How many bones are in an adult human's body?

What two organs does the rib cage protect?

Who has more bones?

Which is Not protected by the rib cage?

The adult skeleton system is made up of about ______ bones

The smallest bones in the skeleton system are found in the ____

Another name for the skull is the ____

Your bones ______ as you get bigger

What is the arrow pointing to?

The main artery in the heart is the

What part of the heart divides the ventricles into two sides?

How big is the heart?

There are _____________chambers in the heart.

What keeps blood from flowing backwards in the heart?