Muscle and Skeletal Systems: Skeletal System: Functions and Skeletal Structure

17 cards   |   Total Attempts: 183
  

Cards In This Set

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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.