Download Skeletal System

The Skeletal and Muscular Systems
Aim: To understand the role played by the skeletal
and muscular systems in our bodies.
You will learn
The functions of the skeleton.
Three types of joint.
How joints allow movement.
The structure of a moveable joint.
The role of muscles in movement.
An example of antagonistic muscles and how they
work.
www.kidshealth.org For video on muscle and bone
Skeletal System
206 Total Bones
Skeleton – main bones
Mandible
Collar bone
Shoulder
blade
Humerus
Breast bone
Rib
Vertebral
Column
Pelvis
Sacrum
Ulna
Radius
Carpals
Metacarpals
Phalanges
Coccyx
Femur
Patella
Tibia
Fibula
Tarsals
Metatarsals
Phalanges
Skull
Functions of the Skeleton
The skeleton has three functions:
Support:it gives the body shape otherwise we would
collapse
Movement: Along with our muscles the skeleton
allows us to move.
Protection : Many bones protect soft parts ot the body
for example
The skull protects the brian
The backbone protects the spinal cord
Bone
Bone is living tissue that can grow and repair itself made
of
Bone cells
A blood supply
Nerves
Calcium – which makes bone hard and strong.
• Flat Bone
• Long Bone
• Short Bone
Head – Body - Head
Provides Protection
As wide as they are long
A joint is where two bones meet.
The function of a joint is allow movement.
Types Of Joints
Pivot
Hinge
Top of the neck
Elbow/Knee
Ball & Socket
Fused
Shoulder/Hip
skull
Skeletal System Information
Appendicular
System
126 bones
Axial System
80 bones
Connective Tissues
• Cartilage –
• Ligament –
• Tendon –
Allows joints to move easily,
cushions bones, and
supports soft tissue
• Ligaments connect bone
to bone
• Tendons join muscle to
muscle or muscle to bone
Antagonistic Muscles
Muscles only contract (get shorter) the cannot get longer.
Pairs of muscles which work opposite to each other are
called antagonistic pairs of muscles.
Conditions of the Skeletal System
Osteoporosis
Bones become fragile and more likely
to break
Osteoarthritis
Joint disorder where the cartilage is
wearing away