The long bones are those that grow primarily by elongation at an ______________ at one end of the growing bone. The long bones include the _____________, ______________, and ______________ of the legs, the ____________, _____________, and _______________ of the arms, and the ______________ of the fingers and toes.
As a child grows the epiphyses become ________________ (turn to hard bone)
When the cartilage is fully replaced, the line is no longer visible.
This information can be used to approximate a skeleton’s age.
The lines in the illustrated Image 1 show the lines or layers of cartilage between the bone and the epiphyses. The lines are very clear on the bone when a person, either male or female is not out of puberty.
In Image 2, you see no visible lines. This person is out of puberty. The epiphyses have fully joined when a person reaches adulthood, closing off the ability to grow taller or in the case of the arms, to grow longer.