1. Analyze the Function of the Skeletal System

2. Functions There are 5 specific functions:
1. It SUPPORTS body structures and provides shape to the body
2. It PROTECTS the soft and delicate internal organs
For example: the cranium protects the brain, inner ear, and parts of the eye; ribs and breastbone protect the heart and lungs; vertebral column encases and protects the spinal cord

3. continued 3. It ALLOWS MOVEMENT AND ANCHORAGE of the muscles
Muscles that are attaches to the skeleton are called skeletal muscles.
Ligaments are fibrous bands that connect bones to bones and cartilage and serve as support for muscles
Joints are bound together by ligaments; tendons are fibrous cords that connect muscles to bone
Allow for:
Abduction and adduction
Circumduction and rotation
Flexion and extension
Pronation and supination
(Discussed in more detail at the end)

4. continued 4. It PROVIDES MINERAL STORAGE
Bones are a storage depot for minerals such as calcium and phosphorus
In case of inadequate nutrition, the body is able to use these reserves
For example:
If blood calcium drops below normal, the bone releases the necessary calcium into the blood stream; when calcium is above normal, the bone inhibits calcium release
So, skeletal system helps to maintain blood calcium homeostasis

5. 5. It IS THE SITE FOR HEMOPOIESIS
The red marrow of the bone is the site of red blood cell formation
Red marrow is found in long bones, sternum, and ilia (where are the ilia located?)
White blood cells are made in the yellow marrow

6. Types of Motion (pg 107)
Flexion: act of bringing 2 bones closer together which decreases the angle b/t the 2 bones
Extension: act of increasing the angle b/t 2 bones, which results in a straightening motion
Abduction: movement of an extremity away from the midline
Adduction: movement toward the midline
Circumduction: includes flexion, extension, abduction, and adduction
Rotation: movement that allows a bone to move around 1 central axis (for example: turning your head from side to side = pivot)
Pronation: the forearm turns the hand so the palm is downward or backward
Supination: the palm is forward or upward

7. Reading Please pause and read “The Effects of Aging” on page 106
If you need to, make a few notes to help you remember.

8. We are done with this one because we completely covered bone formation, vertebral column, ribs, strongest and longest bone (femur), synovial fluid, and joints in the 1st power point.
See, there is a positive to having a 57 slide ppt, the next one only has 7! 