1.8 Bone and Cartilage Flashcards
Immature cartilage forming cells
Chondroblasts
Cartilage growth where there is mitotic division of pre-ezisting chondroblasts in the aticular cartilage and epiphyseal plates
Interstitial growth
Cartilage growth where there is differentiation of new chondroblasts from the perichondrium
Appositional growth
Most abundant inorganic component of bone
Calcium Hydroxyapatite
Produce organic bone matrix (Osteoid) as stimualted by parathyroid hormone
Osteoblasts
Differentiated osteoblasts surrounded by matrix enclosed within lacunae
Osteocytes
Large, motile, multinucleated cells that functions in the resorption of bone; participate in maintenance of blood calcium homeostasis; giant phagocytic cells in Howship’s lacunae/resorption bays; reabsorption and remodelling
Osteoclasts
Hormone which triggers bone resorption
Calcitonin
Concentric lamellae which surrounds a central Haversian canal contaiing blood vessels, nerves, and connective tissue
Osteon or Haversian System
spaces found between and within lamellae; contains osteocytes
Lacunae
Small canals between lacunae, functions for the exchange of nutrients and metabolic wastes
Canaliculi
Outer boundary of each osteon
Cement line
Transverse or oblique canals for the communication of the central canals with the marrow cavity and periosteum and with one another
Perforating canals / Volkmann canals
Bone formation where osteoblasts differentiate from mesenchyme
Intramembranous ossification
Bone formation through replacement of a preexisting hyalin cartilage template
Endochondral ossification
