BODY FACTS -WHY DOES MY STOMACH RUMBLE WHEN I AM HUNGRY?,HOW MANY BONES ARE MY HANDS?,AND MORE.

 BODY FACTS ON VIDEO-WHY DOES MY STOMACH RUMBLE WHEN I AM HUNGRY?HOW MANY BONES ARE IN MY HANDS?CAN I MAKE AN ARTIFICIAL HEART?HOW BIG IS YOUR BRAIN?WHY DO WE HAVE HAD BREATH IN THE MORNING?HOW MUCH BLOOD DOES MY HEART PUMP EVERY DAY?WHY ARE SCABS HARD IF MADE OF BLOOD?WHY DO PEOPLE FLY ACROSS THE ROOM WHEN THEY GET ELECTROCUTED?