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
Jane (given name) Jane (given name) Jane is a feminine given name. It is the English form of the Old French name Jehanne, which was an old feminine form of the male name Johannes or Ioannes (also the source of the English name John), a Latin form of the Greek name (Iōannēs), which is derived from the Hebrew name יוֹחָנָן (Yochanan), a short form of the name יְהוֹחָנָן (Yehochanan), meaning "Yahweh is merciful". The name was first used in large numbers in the mid-16th century for the daughters of aristocrats as an alternative to the more commonplace Joan. The two names have alternated