The uterus is located in the center of the pelvic cavity in the lower abdomen of the human body, between the bladder and the rectum. It is composed of the uterine fundus, uterine body, uterine isthmus and cervix.
The cervix is a part of the uterus, which refers to the uterine isthmus and the part below the internal opening of the cervix. It is cylindrical, with the upper end connected to the isthmus of the uterus called the internal cervix, and the lower end connected to the cervix external os. During a gynecological examination, what can be seen is the part of the cervix that extends into the vagina and the external opening of the cervix. The shape of the cervix varies from person to person. For women who have never given birth to children, the external os of the cervix is a small and neat circular or oval hole; for women who have given birth to children, the external os of the cervix becomes a horizontal or irregular hole due to injuries during childbirth. gap. This gap divides the external os of the cervix into the anterior and posterior lips of the cervix.
The cervix is mainly composed of connective tissue, with a small amount of smooth muscle fibers and rich blood vessels. The endocervix is a layer of tall columnar epithelium, and the surface of the cervix extending into the vagina is stratified squamous epithelium. There is a clear dividing line between the two types of epithelium, which is often the site of cervical cancer.
This article is provided by Baidu Reading and is excerpted from \”The Clear \”Conception\” Plan\” Author: Sun Jianqiu and Xie Yingbiao