5. MUSCLES
WHY DO WE NEED MUSCLES?
The purpose of muscles are:
To move harmonically.
To protect bones.
6. BONES
BONES ARE HARD
AND RIGID.
MUSCLES ARE SOFT
AND ELASTIC.
KIDS HAVE GOT
OVER 300 BONES.
ADULTS HAVE
GOT 206 BONES.
KIDS AND ADULTS HAVE GOT
650 MUSCLES.
BONES
JOIN AS
WE
GROW
UP
THE FEMUR IS THE LONGEST, THE HEAVIEST AND
THE STRONGEST BONE IN THE HUMAN BODY.
THE STIRRUP IS THE SMALLEST BONE IN THE
HUMAN BODY. IT’S IN THE EAR.
MUSCLES CAN CONTRACT AND RELAX.
MUSCLES