Skeletal System Flashcards
What is the Function of the skeletal system
Supports the body and provides shape and form
Protects vital organs
Allow movement
Production of blood cells
Stores calcium
What are the classification of bone (4 types)
Long bone
Short bone
Irregular bone
Flat bone
Long bones
Articulate at each end
Involved in joint movement
Internal cavities produce blood cells
Scaffold for muscles
Provide strength and flexibility
What are Osteoblasts
Blast = build bone formation
Immature bone cells which synthesise new bone matrix
What are osteocytes
Mature bone cells
What are osteoclasts
Break down bone and resorb old osteocytes and release minerals
=bone resorption
Structure of the long bone
Epiphysis
Diaphysis
Cortex
Periosteum
Endosteum
Medullary cavity
Articular cartilage
Epiphyseal growth plate - epiphseal line
Epiphysis
End of the bone
Diaphysis
Long shaft
Epiphyses
2 ends of the long bone
Honey comb like bone
Spongy or cancellous bone
Diaphysis
Long shaft
Cortex
Hard dense compact bone - gives strength
Periosteum
Thin fibrous outer surface of the bone
Has lots of nerves and blood vessels
Essential for growth repair and nutrient
Endosteum
Fibrous membrane lining inside the medullary cavity
Medullary cavity
Contains bone marrow
