During Growth of a Long Bone, the Site of Growth

Question

During growth of a long bone, the site of growth in length is the
A) medullary cavity.
B) marrow.
C) epiphyseal plate.
D) endosteum.
E) periosteum.

Accepted Answer

The site of growth in length of a long bone is the epiphyseal plate, also known as the growth plate. This is a layer of hyaline cartilage located between the epiphysis and diaphysis of long bones. It allows for growth in length during childhood and adolescence by the process of endochondral ossification. The other options (medullary cavity, marrow, endosteum, and periosteum) are not involved in the process of growth in length of a long bone.