Q: How many joints do we have?
A: scientists think that there are about 230 joints in the human body.
Q: What are your nails made of?
A: Human fingernails are essentially made up of the same long fibers that human hair is made of, it is a protein called keratin.
Q: What are boogers?
A: Boogers are mucus . Mucus is the thin, slippery material that is found inside your nose.