The cervix is part of a woman's reproductive system that connects the uterus and the vagina. The cells, such as squamous and glandular cells, are present in the cervix. Abnormal and uncontrolled growth and division of these cervical cells result in cervical cancer. Most cases of cervical cancer are due to specific strains of human papillomavirus (HPV).
That said, the cells of the cervix do not suddenly change into cancer cells. Instead, they gradually undergo abnormal changes and form precancerous cells. Detecting the precancerous cells through screening can prevent these cells from progressing into cancer cells.