The region between the body and cervix is referred to as the isthmus: during pregnancy, it is known as the "lower uterine segment." The cavity of the isthmus was formerly called the "internal os." The cervix extends inferiorward and posteriorward and usually forms approximately a right angle with the vagina.
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Answer:
The region between the body and cervix is referred to as the isthmus: during pregnancy, it is known as the "lower uterine segment." The cavity of the isthmus was formerly called the "internal os." The cervix extends inferiorward and posteriorward and usually forms approximately a right angle with the vagina.
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