The wider section at each end of a bone is the:

1. The shaft is the diaphysis. 2. The ends are filled with spongy bone. 3. The wider section at each end of the bone is called the epiphysis. 4. So the answer is the epiphysis. _Source: OpenStax 'Anatomy and Physiology 2e', Ch 6 'Bone Tissue and the Skeletal System'_