A r t e r y 🫀

أسئلة هيدونك لطلاب الدفعه الرابعه مع الحلول( الكتروني) * الحل ما متأكد منه

اهم من شكلك و اخلاقك 😁😁😁😁

Day 1: Fertalization Day 2: cleavage ends with 2 blastomeres Day3: Morula is formed compaction occurs Day 4: Inner and outer cell mass forms (embryoblast and trophoblast) embryo is called blastocyst Day 5: Hatching (zona pellucida is gone) Day 6: Implantation into uterine wall begins Day 7: Implantation occurs Day 8: Bilaminar disk formation: - Trophoblast differentiated into cytotrophoblast and syncytiotrophoblast - embryoblast differentiated into epiblast and hypoblast Amniotic cavity appears Day 9: LACUNAR STAGE Primitive yolk sac is formed (attached to wall of cytotrophoblast) Day 11: extraembryonic reticlum is formed (later becomes extraembryonic mesoderm) surface epithelium of uterus almost covers defect Day 12: maternal sinusoids invaded by syncytiotrophoblast UTEROPLACENTAL CIRCULATION BEGINS Day 13: Secondary Yolk sac appears The exocoelomic cavity are pinched off (exocoelomic cysts) Primary villi appear Day 14: Chorionic cavity is formed (from extraembryonic mesoderm) embryo and cavity are supported by connecting stalk which: -becomes the future umbilical cord -column of mesoderm

ملف اسألة العام السابق مع الحلول

ام سيكيوات تنفسي لكوز الفسلجة ..