1. Skeletal System

2. Bones are living tissue
Three main Functions:
Support (What would you look like without bones?)
Protect Internal Organs
Movement
Bones are the strongest connective tissue.
There are 206 bones in adult humans

3. Two Types of Bone Tissue
Compact Bone:
Found on the out side of the bone.
Layer is very hard and tough.
It covers the outside of most bones.
Spongy Bone:
Found in side the bone
Strong and lightweight
Made of a calcium network.
Contains bone Marrow: where red blood cells are made.

4. Your Skeleton is Divided Into Two Sections:
Axial Skeleton
Forms the axis
Provides support and protection
Includes: skull, ribs, and vertebrae
Appendicular Skeleton
Function to allow movement
Includes: femur, tibia, fibula, humerus, ulna, radius, and scapula

5. Skeleton Development Infancy Childhood Adolescence Adulthood
Contain more bones
The skull is made up of several bones to allow for growth.
Bones have more space between each other.
Childhood
Growth occurs at areas called growth plates
Long Bones grow at their ends
Adolescence
At the end of adolescence bones stop growing.
The growth plate is the last portion of the bone to become hard.
Adulthood
Old bone is broken down and new bone is formed.
As people get older, more bone is broken down than formed.
This can lead to fragile bones and cause the likelihood of a broken bone to occur.

7. How can I move? Joints and Ligaments.
Joint: Where two or more bones meet
Ligament: attach bones at the joins

8. Types of Joint Ball and Socket- Hip and Shoulder Hinge- elbow and knee
Pivot- Head and arms
Immovable- Skull
Gliding- Wrist and Spine