Which of the following is true regarding endochondral ossification?
A) the majority of the bones of the body are formed in this way.
B) the epiphysis gets its blood supply from the diaphyseal periosteal bud.
C) bone begins replacing the cartilage model shortly after birth.
D) the marrow cavity is the first bony structure to form.

Question

Quizplus · Accepted Answer

Endochondral ossification is a process of bone formation that occurs by replacement of a hyaline cartilage model. The majority of the bones in the body, especially long bones (such as the femur and humerus), are formed by endochondral ossification. Therefore, option A is true. Option B is not true because the epiphysis, which is the end of a long bone, gets its blood supply from the epiphyseal artery, not the diaphyseal periosteal bud. Option C is not entirely accurate as bone begins replacing the cartilage model during fetal development and for several years after birth, not shortly after birth. Option D is also not true because the first bony structure to form during endochondral ossification is the diaphysis (shaft), not the marrow cavity.

Which of the Following Is True Regarding Endochondral Ossification