Vertebral column and sacral curvatures) form during fetal development. The secondary curves develop after birth. The cervical curvature forms as a result of lifting the head and the lumbar curvature forms as a result of walking. The vertebral column surrounds the spinal cord which travels within the spinal canal, formed from a central hole within each vertebra. The spinal cord is part of the central nervous system that supplies nerves and receives information from the peripheral nervous system within the body. The spinal cord consists of grey and white matter and a central cavity, the central canal. Adjacent to each vertebra emerge
Halving the Bones years prior to the events depicted in the documentary. In Japan, when someone is cremated, their bones are not reduced to ash. Instead, half are preserved and split between the descendants. The rest of the bones are buried in a cemetery. Ruth is given a fragment of skull, a small part of a rib, and an unidentified bone to bring back the United States for her mother who did not attend the funeral. Reluctant to give the bones to her mother, Ruth lets the bones sit in a tea can on her shelf in her closet. Years pass by, and