Which step is not necassary step in the formation of endochondral bone?

The step that isn’t needed is that hyaline cartilage changes to adipose tissue. Adipose is another way of saying “fat”. If you don’t believe me, look up the adipose creatures from Doctor Who; there is some science there. Anyway, as the previous long answer states, there is a lot that goes into creating bone in a fetus.

The first thing that happens is that the hyaline cartilage takes the shape of the bone that will eventually be there.

Then, periosteum forms from the connective tissues. Finally, osteoblasts deposit the osseous tissue that replaces the cartilage.

So, it then goes to follow that answer the hyaline cartilage changing into adipose tissue is the only answer that could be correct.

When a fetus is developing endochondral ossification is one of two processes that causes bone tissue to be created. Some of the steps in this formation are that the Hyaline cartilage develops into the shape of a future bone. Periosteum forms from connective tissue on the outside of the developing bone. Osteoblasts deposit osseous tissue in place of the disintegrating cartilage.

The growth is measured by the diameter of these bones. First ossification will occur in the middle of diaphysis which is the shaft. Then the perichondrium becomes the periosteum. Then there’s the bone collar that forms. Then chondrocytes begin to grow. They change from secreting collagen and begin secreting alkaline phosphatase which is an enzyme. It is necessary for mineral deposits.