Science 4th, unit 2

Science 4th, UNIT 2

SCIENCE 4th grade

UNIT 2

The LOCOMOTOR SYSTEM Teacher: J. César Brazo

El Tomillar, J.C. Brazo

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Science 4th, UNIT 2

The LOCOMOTOR SYSTEM First, let's remember a little bit...

our BODY has got different

SYSTEMS that carry out different

functions

and are formed by different

ORGANS

(nutrition, sentivity, reproduction...)

El Tomillar, J.C. Brazo

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Science 4th, UNIT 2

Locomotor System FUNCTION

ORGANS

Permits us to MOVE

Bones Muscles Joints Ligaments Etc.

El Tomillar, J.C. Brazo

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Science 4th, UNIT 2

SKELETAL SYSTEM is made up of...

ALL THE BONES,

GIVE SHAPE TO OUR BODY

JOINTS,

KEEP OUR BODY UPRIGHT

TENDONS,

PERMIT US TO MOVE

and LIGAMENTS

PROTECT DELICATE ORGANS

El Tomillar, J.C. Brazo

functions...

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Science 4th, UNIT 2

We have more than 200 bones.

They are in...

Our HEAD, TRUNK and

LIMBS

FUNCTIONS

Holds up our body

El Tomillar, J.C. Brazo

Protects delicate parts

Helps move us

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Science 4th, UNIT 2

skull bones esternum

humerus

ribs

vertebrae ulna

radius

pa rie tal

Most important bones in the HEAD, TRUNK and LIMBS

frontal

nasal

hand bones

pelvis

tibia

femur

lower jawbone

fibula

foot bones

El Tomillar, J.C. Brazo

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Science 4th, UNIT 2

MAIN BODY BONES

El Tomillar, J.C. Brazo

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Science 4th, UNIT 2

The place where two bones meet

JOINTS MOVABLE Permit important movements like the knee, elbow, wirst, shoulder...

SEMIMOVABLE Permit small movements vertebrae in the backbone

FIXED They don't permit any movement bones in the skull

El Tomillar, J.C. Brazo

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Science 4th, UNIT 2

MOST IMPORTANT BODY JOINTS Shoulder

Elbow Wrist

Hip

Knee

Ankle

El Tomillar, J.C. Brazo

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Science 4th, UNIT 2

PARTS OF A JOINT Bone

Cartilage - Elastic tissue - Protects bones and joints

El Tomillar, J.C. Brazo

Ligaments

Bone

- Strong and flexible tissue - Hold bones together

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Science 4th, UNIT 2

biceps

MUSCLES

ab

do

m

in

al

s

Voluntary Muscles: We move them when whenever we want They're attached to our bones

Involuntary Muscles: the heart

FUNCTIONS

El Tomillar, J.C. Brazo

We move them without thinking of it They are related to important functions But they DON'T BELONG to the LOCOMOTOR SYSTEM

- It gives shape to our body - Permit us to move - Some muscles protect organs

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Science 4th, UNIT 2

most important BODY MUSCLES

El Tomillar, J.C. Brazo

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Science 4th, UNIT 2

- They are strong and flexible - They attach muscles to bones

TENDONS Bone

Tendon Muscle

El Tomillar, J.C. Brazo

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Science 4th, UNIT 2

HOW MUSCLES AND BONES WORK

Muscles contract: they become shorter and thicker Muscles relax: They become longer and thinner

El Tomillar, J.C. Brazo

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Science 4th, UNIT 2

TO KEEP HARD AND STRONG, OUR BONES NEED... green leafy vegetables (brocoli, etc.)

salmon & sardines

diary products (milk products)

they are rich in calcium and other minerals

children's bones are growing up, so you need to have lots of calcium

El Tomillar, J.C. Brazo

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Science 4th, UNIT 2

KEEP YOUR LOCOMOTOR SYSTEM HEALTHY

Keep a balanced diet an drink water Exercise safely

Exercise regularly Warm up before and cool down after exercising

El Tomillar, J.C. Brazo

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