Musculoskeletal System Flashcards
What are the three functions of the skeleton?
- Support
- Protection of internal organs
- A rigid frame for movement
How many bones does a human skeleton have?
206 bones
What are the two sections of the skeleton called?
Axial and Appendicular
How many bones are in the vertebrae?
33 bones
What are the 5 sections of the vertebrae and how many bones do each of them contain?
- Cervical (7)
- Thoracic (12)
- Lumbar (5)
- Sacrum ( 5(fused))
- Coccyx (4(fused))
What parts of the body are included in the appendicular skeleton?
- Pectoral girdle
- Pelvic girdle
- Arms
- Legs
What parts of the body are included in the axial skeleton?
- Skull
- Ribs
- Sternum
- Spine
What’s contained in the Medullary Cavity and what is it used for?
Yellow bone marrow is contained in the Medullary Cavity and it stores fat.
What is the periosteum?
It is a tough fibrous layer that surrounds each bone.
Where’s cartilage located and what does it do?
Cartilage covers the tips of bones in joints and acts in reducing friction and acting as a shock absorber.
What is compact bone comprised of?
It consists of osteocytes embedded in a matrix of calcium salts and a protein called collagen.
Where is compact bone mainly found?
It is mainly found at the outer edge of a bone.
What is spongy bone comprised of?
It consists of a network of thin, bony columns and plates, along with marrow (red or yellow).
What do red cells make?
Blood cells
What are three types of joints? Name an example of each.
- Immovable - Skull
- Partially moveable - Wrist
- Free moving (synovial) - N/A
