Skeletal system 6

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THE MUSCULOSKELETAL SYSTEM

THE MUSCULOSKELETAL SYSTEM
• It is composed of many muscles and bones.
• It lets you move your body parts and go from
one ...

BONES MUSCLES

THE HUMAN SKELETON
• Humans have got an internal skeleton. It is
made of 206 different bones.
• Bones are rigid and hard.

Functions of the skeleton:
• 1---It supports the body and helps to keep its
shape.

• 2---It protects the body’s soft organs, like the
brain, the lungs and the heart.

• Bones can move because
they are connected to
muscles.
• 3---So movement is
another function of the
skeleton.

BONES
• Bones can be different shapes and sizes.
• There are long bones, short bones, flat bones
and cylindrical bones.

• The FEMUR is the longest bone in the body.

• The PELVIS is the biggest bone in the body.

• the EAR BONES are the smallest bones in the
body.

We can put the human bones into three groups:
1--- bones in the head
2--- bones in the extremities ( arms and legs)
3--- b...

SKULL / CRANIUM

The bones in the torso are:
The spine
The sternum
The ribs

THE SPINE IS FORMED
BY 33 VERTEBRAE

https://www.youtube.com/watch?v=Of3XS-gU8dc
https://www.youtube.com/watch?v=ChhPpAKKqHI
https://www.youtube.com/watch?v=UX...

Muscles are soft and elastic

There are more than 600 muscles all over
the human body.
Muscles are made of muscle cells. These
cells can contract and re...

When a muscle contracts it becomes
shorter.
When a muscle relaxes it becomes
longer.
CONTRACT ----------------- SHORTER
RE...

QUADRICEPS

TYPES OF MUSCLE
• SMOOTH
• CARDIAC
• SKELETAL

SKELETAL
• Muscles that are attached to bones iare
skeletal muscles.
• Skeletal muscles are also called voluntary
muscles....

• SKELETAL MUSCLES ARE ATTACHED TO BONES
BY TENDONS

CARDIAC MUSCLE
• Your heart is made of cardiac muscles, which
• are found only in the heart.
• A cardiac muscle is a type ...

Smooth muscles
• They are muscles found in the stomach,
intestines and bladder.
• They contract and relax to digest the fo...

Muscles have got different
shapes:
• Long muscles: like the ones in your
legs
• Flat muscles: like the ones in your face
•...

Joints
• There are 3 types:
1. Fixed: they cannot move
2. Semi-moveable: they can move a little
(vertebrae)
3. Moveable: t...

FIXED JOINT

SEMI-MOVEABLE JOINT

MOVEABLE JOINT

which includes
The bones of the head
The bones of the trunk
The bones of the
extremities
The muscles of the trunk
The musc...

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