all the nerve cells and nervous tissues in an organism, including, in the vertebrates, the brain, spinal cord, ganglia, nerves, and nerve centers: it coordinates and controls responses to stimuli and conditions behavior and consciousness.
Cervical polyps are small, elongated tumors that grow on the cervix. The cervix is the narrow canal at the bottom of the uterus that extends into the vagina. The cervix connects the uterine cavity and the upper portion of the vagina. It acts as the passageway for sperm to fertilize an egg, which could result in pregnancy. During labor, the cervix becomes thinner and wider.
Effacement: Thinning of the cervix. Before labor, the lower part of your uterus called the cervix is typically 3.5 cm to 4 cm long. As labor begins, your cervix softens, shortens and thins (effacement). You might feel uncomfortable, but irregular, not very painful contractions or nothing at all.