1. Skeletal System
Skeletal Organs: Bones (made up of cells, protein fibre and minerals)
Skeletal Tissue: Connective tissue
Skeletal Cells: blood cells, fat cells, osteocytes
Molecules: Calcium matrix

2. Skeletal System
Skeletal System - Acts some major ways:
Support and protection
Movement
Hematopoiesis
Storage
Growth and Development

3. Support and Protection
Primary function is to protect body’s viatl organs i.e. skull protects the brain, ribcage protects the heart, spine protects the spinal cord.
The appendicular skeleton provide support and flexibility to joints and anchor muscles for movement.

4. Movement
The bones of the skeletal system act as attachement points. Two ways:
pulling two or more bones closer or far apart
Joints which pivot

6. Hematopoiesis
Red bone marrow produces red and white blood cells in a process known as hematopoiesis. Red bone marrow is found in the hollow space inside of bones known as the medullary cavity. Children tend to have more red bone marrow compared to their body size than adults do, due to their body’s constant growth and development.

7. Storage
-Storage of calcium ions (which are needed for muscular and nervous system fuction)
Growth and Development
can grow as the person gets older. At birth the person has over 300 bone and as they get older they have 206.

8. Skull - protects the brain
Vertebrate - protects the spinal cord and provides structural support with minimal movement
Cervical - Protects the neck and allows greater movement
Thoracic - Protects the upper back and creats structural support
Lumbar - Protects the lower back
Sacrum - fused structural movement
Coccyx
Sternum and ribs - provide pretection for the vital chest organs i.e. heart and lungs - allows minimal movement

9. Shoulder/arms/hands
Clavical holds the should to the vertebrate -
Humerus - large structure of the upper arm allows hing movement of the elbow
Ulna (pink side of lower arm) and Radius )thumb side of lower arm - allow for pronation of the lower arm and wrist
Carples/Metacarples and phalanges - allow for dexteristy in the hands
Pelvis- protects the vital reproductive and renal organs and acts as hing for the hip joint. Large amount of heamopoisis.
Femur- large structure of the upper leg allows hing movement of the knee
Fibula (outer side of lower leg) and Tibia(inside of lower leg- allow for pronation of the foot and ankle
Tarsles/MetaTarsles and phalanges - allow for dexterity in the foot and toes

12. A healthy skeletal system therefore:
Bones in tact (hard on the outside and haematopoisis on the inside)
Joints can move in their normal space without pain and issues
Allows for straight posture with no pain.