has part has part has_part characteristic of has modifier osteoblast abnormal osteoblast cell number increased osteoblast cell number greater than average number of skeletogenic cells that secrete osteoid, are capable of producing mineralized (hydroxyapatite) matrix, are located adjacent to or within osteoid tissue, and arise from the transformation of a preosteoblast cell increased osteoblast formation MP:0004988 MP:0002744 MPheno.ontology abnormal increased amount