+
Related Flashcards
Cards In This Set
| Front | Back |
|
How does the skeletal system provide structural rigidity and support?
|
Structural rigidity and support: bone forms the body's framework.
|
|
How and why does the skeletal system store calcium?
|
Calcium storage: bone stores calcium. When blood calcium is low, parathyroid hormones signal bone tissue to break down and release calcium.
|
|
How does the skeletal system perform the function of physical protection?
|
Physical protection: rib cage protects internal organs. Skull protects brain. Spine protects spinal cord. Many large bones also shelter bone marrow that contains stem cells that make blood.
|
|
What is the shape of long bones?
|
Long bones: shaped like a rod. eg. arm, leg, finger bones.
|
|
What is the shaps of short bones?
|
Short bones: shaped like a cube. eg. wrist, ankle bones.
|
|
What are flat bones?
|
Flat bones: bones that are flat. eg. sternum, shoulder blades, ribs, skull.
|
|
What are irregular bones?
|
Irregular bones: complicated shapes. eg. vertebrae, hip.
|
|
What is a joint?
|
Joint = where bone meets bone.
|
|
What are mobile joints?
|
Mobile joints (synovial) have a fluid-containing cavity to lubricate movements of the bones.
|
|
What are non-mobile joints?
|
Non-mobile joints connect bone to bone with cartilage or fiber.
|
|
Where are the ball and socket joints present?
|
Ball and socket joint: shoulder, hip.
|
|
Where is the hinge joint present?
|
Hinge joint: elbow.
|
|
Where is the gliding joint present?
|
Gliding joint: wrist
|
|
Where is the immobile joint present?
|
Immobile joint: plates of the skull, rib-to-sternum.
|
|
Which joint type allows most freedom of movement?
|
The joint type that allows most freedom of movement = ball-and-socket.
|
