Question

Endochondral ossification: correctly math the sentences with its step

During stage 1-by the end of stage 2- by the end of stage three - during stage 4 - stage 5 involves

Ossification of the epiphyses, a bony collar forms around the diaphysis, the center of the now vascularized diaphysis calcifies, the medullary cavity is formed, diaphysial chondrocytes enlarge then die,

Answer 1

Stage 1 - chondrocytes enlarge and then die
Stage 2-bony collar forms around the diaphysis
Stage 3- centre of the now vascularised diaphysis now calcifies.
Stage 4- the medullary cavity is formed.
Stage 5- ossification of the epiphyses.

These are the stages of endochrondral bone formation.
The initial cartilaginous cells enlarge and die and forms spaces. In the second stage we can see the formation of a bone collar with the uncalcified matrix inside. Then the bone collar forms the periosteum and the inner vascularised part calcifies. In the fourth stage it starts to form the medullary cavity and the fifth stage leads to ossification.
Most of the bone ossification is by this form.

Thank you...