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Questions and Answers
Which structure appears on Day 13 as a small cavity within the exocoelomic cavity?
What is the size of the bilaminar disc on Day 11-12 compared to the trophoblast?
What are the trophoblast primary villi formed by on Day 13?
Study Notes
- Day 11-12: Bilaminar disc grows slowly compared to trophoblast, remains small.
- Day 11-12: Decidua reaction begins, endometrial cells become glycogen and lipid-loaded, tissue is edematous.
- Day 13: Endometrial defect at implantation site completely heals.
- Day 13: Trophoblast primary villi appear, formed by cytotrophoblast cells penetrating syncytiotrophoblast.
- Day 13: Secondary yolk sac appears as small cavity within exocoelomic cavity.
- Day 13: Chorionic cavity and chorionic plate appear, formed by trophoblast and somatopleuric layer of extraembryonic mesoderm.
- Day 13: Buccopharyngeal membrane appears as slight thickening of hypoblastic disc at cephalic region.
- Bilaminar disc remains very small, measuring 0.1 to 0.2 mm.
- Decidua reaction initially confined to implantation site but soon occurs throughout endometrium.
- Trophoblast primary villi form cellular columns surrounded by syncytium.
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Description
Test your knowledge on the early stages of embryonic development with this quiz! From the bilaminar disc to the appearance of the chorionic cavity and primary villi, this quiz covers important milestones that occur during the first two weeks of pregnancy. Sharpen your understanding of embryonic structures and their functions, and gain a deeper understanding of the intricate process of implantation. Keep up with the medical jargon and enhance your expertise in embryology. Get started and take this quiz now!
