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Questions and Answers
What are the four primary bone cells?
What are the four primary bone cells?
Osteogenic cells, osteoblasts, osteocytes, and osteoclasts.
What is the role of an osteogenic cell in the formation of bone tissue?
What is the role of an osteogenic cell in the formation of bone tissue?
Precursor to osteoblast.
What is the role of an osteoblast in the formation of bone tissue?
What is the role of an osteoblast in the formation of bone tissue?
Deposits osteoid (matrix for mineralization) and forms bone tissue.
What is the role of an osteocyte in the formation of bone tissue?
What is the role of an osteocyte in the formation of bone tissue?
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What is the role of an osteoclast in the formation of bone tissue?
What is the role of an osteoclast in the formation of bone tissue?
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Study Notes
Primary Bone Cells
- Four key types of bone cells: osteogenic cells, osteoblasts, osteocytes, and osteoclasts.
Osteogenic Cells
- Serve as precursors to osteoblasts, initiating the bone formation process.
Osteoblasts
- Known as "builders" (blasts = build); responsible for depositing osteoid, which serves as a matrix for mineralization.
- Major function is to form new bone tissue through the secretion of bone matrix components.
Osteocytes
- Mature osteoblasts that become embedded in the osteoid; their nickname "sitters" (cytes = sit) reflects their stationary nature.
- Reside within lacunae ("lakes") and play a crucial role in maintaining bone tissue by regulating mineral content.
Osteoclasts
- Referred to as "breakers" (clasts = break); these cells originate from hematopoietic stem cells.
- Travel through blood canals to resorb or remove bone mineral, facilitating bone remodeling.
- Key functions include bone matrix destruction and repositioning, essential for maintaining overall bone health and integrity.
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