A&P - Chapter 11 (Part 5) Flashcards
What do osteoblasts form?
Bone matrix
What do osteoblasts secrete?
Collagen fibres
What do osteoblasts initiate?
The process of calcification
What do osteoblasts develop into?
Osteocytes
Where are osteoblasts found? (2)
- Periosteum
2. Endosteum
What do osteoclasts do?
They are huge cells that digest bone matrix
- bone resorption
What are osteoclasts part of? (4)
- Normal bone growth
- Development
- Maintenance
- Repair
Where are osteoclasts concentrated?
In the endosteum
What do osteoclasts secrete?
Digestive enzymes to digest the bone matrix
What type of bone cell are osteocytes?
Mature bone cells
What do osteocytes no longer secrete?
Matrix
What are osteocytes responsible for?
Maintaining the bone
What do osteocytes regulate?
The amount of Ca deposited on the matrix
Where are osteocytes located?
Within lacunae
What are newborns skeleton made up of?
Many bones made of cartilage and other fibrous material
