# data[].attributes.body
cartilage model made

# data[].attributes.body
bone begins to form, mid-diaphysis & forms bone collar

# data[].attributes.body
Ossification center is made

# data[].attributes.body
Cartilage degenerates in the epiphyses

# data[].attributes.body
Ossification continues, forms secondary center on bone ends

# data[].attributes.body
Bone continues to replace cartilage from both directions