Body parts. Primary education.

1. We can move.
unit 3
CBM Los Pinos

2. Our body is made up of our
head, torso and limbs.
HEAD
LIMBSTORSO

3. The locomotor system is what lets us
move the different parts of our body
and allows us to move around.
We can move our body in many ways:
We can run
We can jumpWe can walk

4. The locomotor system includes
bones, joints and muscles.
All the bones in our body make up
the skeleton
We have muscles
around many of
these bones.
Most bones
are connected
at joints.

5. The skeleton is made up of
all the bones in our body.
An adult has 206 bones.
But a baby has more!
A baby has about 300 bones!
This is because some of our bones
join together as we grow.
Bones are hard and rigid.
They are very strong and they don’t
bend.

6. The skeleton has three parts:
Skull
Torso
Limbs

7. The skeleton has two functions:
It supports our body It protects the delicate organs
inside our body
The skull protects
our brain.
The ribs protect
our heart and
lungs.

8. The bones in our body are all different shapes.

9. There are three types of bones:
 Some are short.
Vertebrae are short bones.

10.  Some are long.
The tibia is a long bone.

11.  Others are flat.
Our skull is made up of flat bones.

12. There are long bones in our arms and legs.
Long bones
Long bones

13. There are short bones in our spine, hands and feet.
Spine Hand Foot

14. There are flat bones in our skull,ribs,
pelvis and scapula.
Skull
Scapula
Ribs
Pelvis

15. Can you remember the name of some joints
in our body?
Joints
Wrist
Knee
Shoulder
Hip Elbow
Ankle

16. Our bones are connected at joints.
Shoulder
Elbow
Wrist
Hip
Knee
Ankle

17. Some joints allow our bones to move a lot.
We call these flexible joints.
The joints in our knees
Our elbow
and shoulders
are all flexible
joints.

18. Some joints only let our bones move a little.
We call these semi-flexible joints.
Our spine has semi-flexible joints.
The vertebrae in our spine are semi-flexible joints.

19. Some bones are connected at joints that can’t move.
We call these fixed joints.
The joints in our skull are fixed joints.

20. Muscles
 Muscles are soft when relaxed.
 Most muscles are connected
to bones.

21. Muscles move our bones by contracting and relaxing.
When muscles contract, they get shorter.
When muscles relax, they get longer.

22. The Biceps and the Triceps work together.
When the biceps relax,
the triceps contract.
When the biceps contract,
the triceps relax.

23. We have two types of muscles
Voluntary Involuntary
We can move voluntary
muscles when we want.
We can’t control involuntary muscles.
They move automatically.
When we dance, run, jump,… Our heart is an involuntary muscle.
It moves all the time without us thinking
about it. Even when we are asleep!

24. There are over 600 hundred muscles in our body, and
every muscle has a special function.

25. In our arms there are biceps and triceps.
Biceps
Triceps
We use these muscles
to write, play tennis
or pick things up.

26. In our legs there are biceps, quadriceps and calf muscles.
Biceps
Calf
muscles
Quadriceps
These muscles help us walk, run and jump.

27. In our shoulders there are deltoids.
Deltoids
The trapezius muscle is in our back.
It helps us move our arms.
Trapezius

28. In our chest there are pectorals.

29. Our abdominals are near our stomach.
These muscles help us
bend down.
Abdominals

30. We also have many muscles in our face.
The masseter help us chew our food.
Masseter