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chondrogenesis
Chondrogenesis is the process by which cartilage is developed.
==Cartilage in fetal development==
In embryogenesis, the skeletal system is derived from the mesoderm germ layer. Chondrification (also known as chondrogenesis) is the process by which cartilage is formed from condensed mesenchyme tissue, which differentiates into chondrocytes and begins secreting the molecules that form the extracellular matrix.
Early in fetal development, the greater part of the skeleton is cartilaginous. This ''temporary'' cartilage is gradually replaced by bone (Endochondral ossification), a process that ends at puberty. In contrast, the cartilage in the joints remains unossified during the whole of life and is, therefore, ''permanent''.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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