What is the purpose of the placenta? Which part of the blastocyst eventually becomes the fetal placenta? In birds, developing chicks rely on the yolk sac to provide essential nutrients, but in humans, this is not the case. Why don’t we need it to provide nutrition? What is amniocentesis? How is it done?

What is the purpose of the placenta? Which part of the blastocyst eventually becomes the fetal placenta? In birds, developing chicks rely on the yolk sac to provide essential nutrients, but in humans, this is not the case. Why don’t we need it to provide nutrition? What is amniocentesis? How is it done?

Science Of Agriculture Biological Approach

5th Edition

ISBN:9780357229323

Author:Herren

Publisher:Herren

Chapter11: Animal Reproduction

Section: Chapter Questions

Problem 5RQ

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Similar questions

How is an egg (oocyte) prepared during oogenesis for fertilization? Why is preparation essential to development?
Which embryonic germ layer lines the inner surface of the archenteron? Which embryonic germ layer lines the outer surface of the embryo?
What is the fate of the inner cell mass? Which of the structures produces human chorionic gonodotropin (HCG)? What is the function of HCG? What would happen to the implanted blastocyst if HCG were not secreted?
Which of the following is required for successful fetal development after the egg has been fertilized? a) That the corpus luteum remains throughout the pregnancy b) Production of estrogen (estradiol) and progesterone from the placenta c) Release of hCG (human chorionic gonatotropin) from the placenta
What is yolk? What is its role in fertilization and development?
How many follicle cells will fit inside? Is there an abundance of yolk within the cytoplasm of the mammalian oocyte? Where will the fertilized egg develop and how will it receive its nutrients? please help
What are the archenteron and the blastopore? What is the stage of the embryonic development in which these structures are formed? What are the destinations of the archenteron and of the blastopore?
What are three notable features between the fertilized and unfertilized egg?
Gastrulation does NOT Select one: a. involve the formation of germ layers b. consist of endoderm, mesoderm, and ectoderm c. result in the formation of a third layer in the embryonic disk d. include the differentiation of cells into tissues and organs
Describe the development of reproductive organs in a fetus of each gender. Which genes, gene products, and hormones are involved in the sex differences? Which sex- related hormones are circulating in high concentrations in a pregnant woman compared to a nonpregnant woman? Do these hormones cross the placenta (if you are uncertain, consider hormone chemical class relative to membrane permeability to make an educated guess)? Assuming these hormones do cross the placenta, how do they affect the hormonal environment inside the fetus, and how does this relate to fetal reproductive development?
How does the embryo get nourishment inside the mother’s body?
what is the process which involves in the self-destruction of cells in the developing embryo as shown in the disappearance of the embryo’s tail?