سؤال بدقيقة 25:5 مو صار. DNA REPLICATION يعني تضاعف عدد الكروموسومات من 23الى 46 بدقيقة 26:5 من يصير إتحاد ومزج للمادة الوراثية كلت يجي ٢٣ من الذكر و ٢٣ من الانثى ويصير ٤٦ زين هية مو المفروض تضاعفت يعني الذكر ٤٦ والانثى ٤٦ يعني من يتحدون يصير ٩٢ ؟؟
Doctor Can you answer me, please We know the uterine wall consists of three layer ( endometrium, myometrium, perimetrium) what the role of these layers in the case of fertilization and non fertilization?
The perimetrium layer is just the serous layer that cover the uterus. The myometrium layer is the intermediate muscular layer, in case of fertilization this layer serve as a supportive layer to to make the uterus able to carry the embryo, and the presence of progesterone hormone prevent the contraction of this layer during the pregnancy. In case of no fertilization, this layer contract hardly and make the endometrium to slice and shed out during menstruation. The endometrium layer is the spongy inner layer of the uterus. in case of fertilization, the newly formed embryo will implanted inside this layer, but, in case of no fertilization, this layer will be sliced and shed out during menstruation in because of the myometriul contraction.
