Page 175 - DK Children's Encyclopedia

Muscles SEE ALSO

▸ ▸ Body cells p.41
▸ ▸ Feelings p.99
Muscles are stretchy cords that pull parts of the body to ▸ ▸ Human body
make them move. They work in teams. Some muscles work p.130
without us thinking, others move when we choose to ▸ ▸ Skeleton p.228

move them. Every time we blink, smile, or move, it is with ▸ ▸ Sports p.239
the help of muscles. ▸ ▸ Games
pp.240–241

Muscular system Bicep
Most of our muscles are muscle
wrapped around the bones
of our skeletons, forming the
muscular system. They move
our bodies by pulling on
the bones.

Tricep muscle

Working in pairs
Muscles only pull—they
Muscles are can’t push. To lift your arm
attached to up, biceps pull and triceps
bones by relax. When triceps pull
tendons. and biceps relax, the arm
moves back down again.

The biggest Stomach
muscle in our muscles are
body is in our called abs. Face muscles
bottom. It is The muscles in our face move the eyes
called the
gluteus and mouth and help us to express our
maximus. feelings to others. For example, we
Upper thigh
muscles are show we are happy by smiling.
called quads.

You use
300 Exercise
The more we move our

get. After exercise, the
different muscles muscles, the stronger they
just to stand up. body repairs any damage
to muscle cells by making
new muscle fibers. This is
why muscles become
bigger and stronger the
more you use them.

173

US_173_Muscles.indd 173 16/05/2017 09:49