Bone Biology Flashcards
Bones can be classified by anatomical position (3)?
• Crabial vs. post-cranial
• Axial vs. appendicular
• or by shape
What are the different types of bones?
- Long bones: longer than wide
- Short bones: cubish
- Flat bones: Plated
- Irregular: odd, miscellaneous
- Sesamoud: within tendon, under pressure
Skeletal Function (4)
• protect vital organs
• support for movement
• enable cell production
• store & mobalize minerals
What type of tissue is a bone?
connective tissue
To fulfill these functions, bones needs to:
be strong
have joints & attachment sites
light & flexible
adapt to change
What is the biology of bone at other levels?
Macrostructure (gross anatomy)
Microstructure (cellular)
Gross Skeletal structure what 2 types of bone?
Cortical
Trabecular
A Cortical bone is ___ and equal to ___ bone?
Is compact and = lamellar bone
A Trabecular bone is ___ and equal to ___ bone?
Spongy and = Canellous Bone
What is a cortical bone and how is it ? what % of mass of skelton?
outer surface of bone
hard solid dense
it’s like a protective covering
80% of mass of skeleton
What is the Trabecular bone and how is it? what % of mass skeleton?
Squishy inside of bones
very porous
irregular, flat, and ends of long bones
20% mass of skeleton
Periosteum?
layer of thin fibrous tissue covering outer bone surface
Julius Wolff Law: Bone will adapt to stresses placed on it
More stress= ?
less stress= ?
More stress= more compact bone
less stress= more trabecular bone
What are the 3 main bone cells?
Osteoblast
Osteoclast
Osteocyte
Osteoblast (?)
forms bone matrix
