Skeleton contain 206 bones.
There are 4 bone types.
1. Flat:
-Example: Skull, Shoulder Blades, Ribs, Sternum and Pelvic bones.
-Characteristics: Protect organs.
2. Long:
-Example: Arms and Legs.
-Characteristics: A lot of weight provide structural support.
3. Short:
-Example: Wrists, Ankles.
-characteristics: Create Movements.
4. Irregular:
-Example: Vertebral Column, Kneecaps.
-Characteristics: Muscle Attachment.
The 5 purpose of bone
1. Movement
2. Protection
3. support
4. Mineral Storage
5. Blood cell formation
Structure of long bone
There are 4 bone types.
1. Flat:
-Example: Skull, Shoulder Blades, Ribs, Sternum and Pelvic bones.
-Characteristics: Protect organs.
2. Long:
-Example: Arms and Legs.
-Characteristics: A lot of weight provide structural support.
3. Short:
-Example: Wrists, Ankles.
-characteristics: Create Movements.
4. Irregular:
-Example: Vertebral Column, Kneecaps.
-Characteristics: Muscle Attachment.
The 5 purpose of bone
1. Movement
2. Protection
3. support
4. Mineral Storage
5. Blood cell formation
Structure of long bone
- Compact bone - Outer layer/portion of bone.
- Periosteum - the outer surface of the shaft is a tough covering of fibrous tissue.
- Diaphysis - shaft.
- Medullary Cavity - inside the shaft.
- Epiphyseal plate - when a bone is growing.
- epiphyses - Ends of the bone (top and bottom of the shaft).
- Proximal epiphysis - top of the shaft.
- Distal epiphysis - bottom of the shaft.
- Osteoclasts - Cells that repairs your bone.
- Osteoblasts - Where bone forming cell.