Your skeleton supports your
The muscles
body and is made up of many
are attached
bones. These bones protect
to the bones
your internal organs.
by connective
Muscles work in pairs
tissue
to move different
parts of the body.
When one muscle is
contracted the other
is relaxed.
Green vegetables and dairy
products are good sources
of calcium. Calcium helps
your bones to grow and
stay strong.
Animals who have backbones
are called vertebrates