Fill in the Blanks Cell types skeletal systemOnline version unit 2/lab by Kirsten Storemski 1 elongated hydroxyapatite flexible red Osteoclasts collagen reabsorption 65% decalcification Hydrogen several organic 35% weight Osteocytes ions bearing proteoglycans border Osteogenesis Enzymes Osteoblasts inorganic canaliculi ruffled The matrix of bone is . This includes and . It gives the matrix strength . is . This is . It is a calcium phosphate crystal . It adds strength . produce the matrix of the bone . They have processes that connect to one another . Nutrients pass from cell to cell . by osteoblasts surround their cells . are mature osteoblasts . They are surrounded by matrix . They can transition back to osteoblasts . Cell processes in . are large cells that have nuclei . They have many cellular projections that give it a . It is responsible for the of matrix . pumped across ruffled border cause of matrix . dissolve protein components of matrix . These are derived from stem cells in bone marrow .