Bone Components Flashcards
What does collagen enable bones to do?
- Enable bone to resist being stretched or torn apart (tensile strength).
- Prevents bones being hard and brittle.
Osteoprogenitor cells
Stem cells derived from mesenchyme (connective tissue found in the embryo) that have the ability to become osteoblasts
Osteoblasts
Secretes collagen and other organic components to form bones
(Builders)
Osteocytes
Mature bone cells that maintain the daily activities of the bone
Osteoclasts
Cells found on the surface of bones and they destroy or resorb bone tissue
(Demolition crew)
What can spongy bone also be known as (2)?
- Cancellous
- Trabecular bone
What is spongy bone responsible for?
The flexibility and weight distribution shifts that can withstand multidirectional forces
Describe the structure of spongy bone.
It is light, porous, and is made up of small, needle-like pieces of bone arranged like a honeycomb.
What is compact bone also known as?
Cortical bone
Where is compact bone found?
Forms outer layer of most bones
(Found in shafts of femur, tibia and fibula).
Describe compact bone.
It is dense, hard, and heavy tissue which makes up most of the bone’s weight.
What is the purpose of compact bone?
It provides:
- Strength and protection
- Insulation
- Movement frameworks and ideal for resisting compressive forces.
What are compact bones made up of?
Units called Osteons or Haversian systems.
What (3 things) does osteoclast activity increase?
- Loss of bone mass
- Compact bone thins
- Spongy bone (Bigger gaps)
