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Questions and Answers
What structures are involved in embryonic development?
What structures are involved in embryonic development?
The _____ is the part of the structure that will later form the placenta.
The _____ is the part of the structure that will later form the placenta.
trophoblast
Implantation occurs approximately 8 to 10 days after fertilization.
Implantation occurs approximately 8 to 10 days after fertilization.
True
What is the predicted date of the baby if using a 28-day fixed cycle?
What is the predicted date of the baby if using a 28-day fixed cycle?
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What is a blastocyst?
What is a blastocyst?
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Match the following terms with their definitions:
Match the following terms with their definitions:
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50% of zygotes do not achieve implantation.
50% of zygotes do not achieve implantation.
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What does the placenta refer to in Latin?
What does the placenta refer to in Latin?
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Study Notes
Embryonic Development Structures
- Trophoblast is the outer layer of the blastocyst. The trophoblast will eventually give rise to the placenta.
- Implantation is the process by which the blastocyst attaches to the uterine wall. This usually occurs 8 to 10 days after fertilization.
- Blastocyst is a hollow ball of cells that forms after the zygote undergoes several cell divisions.
- Placenta is a specialized organ that develops during pregnancy, providing oxygen and nutrients to the fetus and removing waste products.
Pregnancy Timelines
- Fixed Cycle - Using a fixed 28-day cycle for gestation, the predicted due date for a pregnancy is determined by adding 280 days (40 weeks) to the first day of the last menstrual period.
- Implantation Failure - It is estimated that 50% of zygotes fail to implant in the uterine lining.
Terminology
- Placenta - In Latin, the word "placenta" means "cake".
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Description
This quiz explores the critical stages of human embryology, focusing on the roles of trophoblast, embryoblast, and the implantation process. Learn about the factors affecting fertilization, how and when implantation occurs, and key concepts related to zygote and embryo development. Test your understanding of these foundational topics in human biology.
