Did you place your hand on the left side of your chest? Many people do ... it takes ten of them to equal the thickness of a human hair. Your body has about 5.6 liters (6 quarts) of blood.

The human body comes in lots of different shapes and ... You have arms, elbows, hands and fingers. You have a chest and a tummy. You have legs, knees, feet and toes. Some of us might need help ...

The human body comes in lots of different shapes and ... You have arms, elbows, hands and fingers. You have a chest and a tummy. You have legs, knees, feet and toes. Some of us might need help ...