The fibrous nature of the human cervix, and its relation to the isthmic segment in gravid and nongravid uteri.

摘要: The fibrous nature of the human cervix and its relation to isthmic segment in 12 gravid 46 nongravid uteri was investigated. In nonpregnant uterus found be composed predominately connective tissue with an average only about 15% smooth muscle. superior is mostly histologic internal os variable respect constricted area known as canal. Thus isthmus indefinite which principally muscle lined by a transitional epithelium bounded below above blends imperceptibly remainder uterine musculature. 3rd month pregnancy elongates considered hypertrophic response pregnancy. When elongation occurs products conception are confined portion require more space musculature unfolds accommodate them thus comes make up part wall ovum chamber. It concluded that from both anatomic functional standpoints forms unit believed concept separate distinct entity should eliminated rather being 2 major parts corpus according whether fundamental structure chiefly muscular fibrous.