Bones Flashcards
What are the 2 types of bone tissue?
Compact and cancellous bone
Compact bone
Strong, dense, good at transmitting force in 1 direction
Cancellous bone
Light/spongey, shock absorbing, resists and channels force from multiple directions
Long Bones are…
Longer than they are wide, thicker compact bone in diaphysis, mainly limbs and clavicle
Short bones are…
Close to equal width and length, mostly cancellous bone, weight bearing in multiple directions e.g carpals and tarsals
Flat bones are…
Not always flat! for muscle attachment and protection e.g skull sternum, thin plates of compact bone, some cancellous too
Irregular bones are…
Not long, not round/square, not just cancellous, not flat, often have holes/foramina
Axial Skeleton
Bones of the core
Appendicular skeleton
Bones of the limbs
What type of tissue is bone?
Connective tissue
What are the 2 extracellular components?
Organic - mainly collagen, resists tension
Inorganic - hydroxyapatite and other Ca minerals, resists compression
What are the 4 types of cells?
Osteogenic cells
Osteoblasts
Osteocytes
Oseoclasts
What is the role of oseogenic cells?
Produce osteoblasts
What is the role of the osteoblasts?
Produce new bone matrix
What is the role of the osteocytes?
Maintainers and communicators - recylce proien and minerals from matrix
