As a long bone develops, the point where osteoblasts first replace calcified cartilage with spongy bone becomes the ________, from which further development proceeds.
A) primary ossification center
B) metaphysis
C) periosteum
D) secondary ossification center
E) epiphyseal line

Question

Quizplus · Accepted Answer

The point where osteoblasts first replace calcified cartilage is known as the primary ossification center, which then leads to further development of the bone. The metaphysis refers to the region between the diaphysis and the epiphysis. The periosteum is a layer of connective tissue that covers the surface of bones. The secondary ossification center is located in the epiphysis of a long bone. The epiphyseal line is the remnant of the growth plate in a mature bone.

As a Long Bone Develops, the Point Where Osteoblasts First