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Multiple Choice
Normally, a zygote implants into the ____ of the uterus.
A
endometrium
B
cervix
C
myometrium
D
perimetrium
Verified step by step guidance
1
Understand the anatomy of the uterus: The uterus is composed of several layers, including the endometrium (inner lining), myometrium (muscular middle layer), and perimetrium (outermost layer). The cervix is the lower part of the uterus that connects to the vagina.
Learn the function of the endometrium: The endometrium is the inner lining of the uterus that thickens during the menstrual cycle in preparation for potential implantation of a zygote (fertilized egg).
Recognize the role of implantation: Implantation is the process where the zygote attaches to the uterine lining to begin development. This requires a nutrient-rich and vascularized environment, which is provided by the endometrium.
Eliminate incorrect options: The cervix is not involved in implantation; it serves as a passageway. The myometrium is the muscular layer responsible for contractions, and the perimetrium is the outer protective layer. Neither of these layers supports implantation.
Conclude that the correct answer is the endometrium, as it is the layer specifically designed to support implantation and early embryonic development.