Skeletal System
Do you think there is an age where itis okay to not be physically fit?
The Skeletal System
The Skeletal System
Structured in 2 groups
Axial skeleton
80 bones of the skull, spine, ribs, vertebrae, andsternum
Appendicular skeleton
126 bones of the upper and lower limbs, shoulders,and hips
The adult skeleton has 206 bones
The Skeletal System
The Skeletal System
Functions
1.Provides mobile framework
2.Protects internal tissues and organs
3.Stores minerals
4.Produces new red blood cells and whiteblood cells
Types of Bones
Long Bones
Ex. – humerus, femur, ulna, radius, tibia, fibula
Types of Bones
Short Bones
Ex. Carpals, tarsals, patella
Types of Bones
Flat Bones
Types of Bones
Irregular Bones
Ex. Facial bones and vertebrae
Joints
Joints are points at which bones meet.
Partially moveable joints are bones heldtogether by cartilage
Example: vertebrae
Freely movable joints are held together byligaments (connects bone to bone)
Most common
Joints
Ball and Socket
Joints
Hinge
Joints
Pivot
Joints
Gliding (ellipsoidal)
Problems of the Skeletal System
Fractures
Hairline fracture –incomplete and the twoparts of the bone do notseparate
Transverse fracture –completely across thebone
Comminuted fracture –bone shatters into morethan two pieces.
Problems of the Skeletal System
Dislocation
Results when the ligaments that attach the boneat the joint are torn as the bone slips out of place.
Never attempt to replace a dislocated joint; get medicalhelp
Treatment would include having the joint reset andimmobilized while the ligaments heal.
Problems of the Skeletal System
Torn cartilage
Can result from a sharp blow or twisting of ajoint.
Treated with arthroscopic surgery
Problems of the Skeletal System
Sprain
Sprains are injuries to a ligament in a joint
Can occur in any joint, but most common inankle and wrist
