The cervix or cervix uteri (Latin: neck of the uterus) is the lower part of the uterus in the human female reproductive system. In a non-pregnant woman, the cervix is usually 2 to 3 cm long (~1 inch) and roughly cylindrical in shape. The narrow, central cervical canal runs along its entire length, connecting the uterine cavity and the lumen of the vagina.
This website is designed to instruct visitors about the meaning of words and their correct usage. To instruct is to give instructions, to teach. Teachers are often called instructors because their job is to instruct, to give knowledge or instructions. The subtle difference between teach and instruct is that you can teach almost anything: concepts, ideas, theories or, say, history. When you instruct someone, you're giving them a set of tools or tasks to do something specific.
A lesson is part of a class; a class is part of a course; a course is part of a program that usually leads to a degree or certification.