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
Brendan (given name) There is no etymological link between "Brendan" and "Brenda". This feminine given name, pronounced , is thought to be derived from the Old Norse element "brand", meaning "(flaming) sword". In most cases, the masculine given name "Brandon", pronounced , is considered to be derived from the surname "Brandon", which is in turn derived from two Old English elements. In some cases, the masculine given name "Brennan" may be used as a contracted form of "Brendan". Brennan is etymologically unrelated to "Brendan". It is derived from the surname "Brennan", which is an Anglicised form of the Irish "Ó Braonáin". The popularity