Bone tissue and structure Flashcards
Why can bone tissue be classified as living
It contains cells
What does ECM stand for
Extracellular matrix
What is bone tissue composed of
Connective tissue and the extracellular matrix
What are the two components of the extracellular matrix
Organic and inorganic
What percentage of the ECM is organic
33%
What makes up the organic ECM
Collagen (protein) and proteoglycans
Purpose of organic ECM
Provides flexibility to resist tension
What percentage of the ECM is inorganic
67%
What makes up the inorganic ECM
Hydroxyapatite and other Ca minerals
Purpose of the inorganic ECM
Makes the bone hard and provides strength
What percentage of bone weight do cells make up
2%
Bone tissue contains what four cells
Osteogenic
Osteoblasts
Osteocytes (mature bone cells)
Osteoclasts
What is the main purpose of the four cells
To maintain bone homeostasis
What do osteogenic cells do
Stem cells that produce osteoblasts
What do osteoblasts cells do
Makers - produce new bone matrix