The cervical spine is made up of the first seven vertebrae in the spine. It starts just below the skull and ends just above the thoracic spine. The cervical spine has a lordotic curve (a backward "C"-shape) - just like the lumbar spine. The cervical spine is much more mobile than both of the other spinal regions - think about all the directions and angles you can turn your neck.
Having to do with any kind of neck including the neck on which the head is perched and the neck of the uterus. The word "cervix" in Latin means "neck". That is why cervical vertebrae and cervical cancer involve quite disparate parts of the anatomy joined only by the meaning of the word "cervix". See the entire definition of Cervical