Microscopic Anatomy of Bones - Bone Cells definitions Flashcards
Microscopic Anatomy of Bones - Bone Cells definitions
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Osteoprogenitors
Bone stem cells in periosteum and endosteum that develop into osteoblasts for bone formation. Osteoblasts
Cells that secrete bone matrix, including collagen and enzymes for hydroxyapatite crystal formation. Osteocytes
Mature bone cells in lacunae that maintain bone matrix and monitor stress. Osteoclasts
Multinucleated cells that break down bone matrix for remodeling and calcium regulation. Extracellular Matrix
Non-cellular component of bone tissue, composed of collagen and hydroxyapatite crystals. Periosteum
Connective tissue lining the outer surface of bones, containing osteoprogenitor cells. Endosteum
Thin membrane lining the inner surface of bones, housing osteoprogenitor cells. Lacunae
Small cavities in bone matrix where osteocytes reside. Canaliculi
Tiny channels in bone matrix allowing nutrient exchange and communication between osteocytes. Hydroxyapatite
Calcium phosphate crystals providing bone hardness and strength. Collagen
Protein fibers in bone matrix, providing flexibility and tensile strength. Bone Remodeling
Process of bone renewal involving osteoclasts and osteoblasts for maintenance and growth. Calcium Homeostasis
Regulation of calcium levels in the body, involving bone resorption and formation. Ruffled Border
Specialized structure of osteoclasts increasing surface area for bone resorption. Osteolysis
Process of breaking down bone matrix by osteoclasts for resorption.
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