Human Biology (MindTap Course List)
Human Biology (MindTap Course List)
11th Edition
ISBN: 9781305112100
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Chapter 17, Problem 8SQ
Summary Introduction

Introduction: By the eighth day of fertilization, the cells of embryoblast begin to differentiate into two layers called hypoblast and epiblast. Hypoblast layer is a layer of small cuboidal cells formed adjacent to the blastocyst cavity. Epiblast layer is a layer of columnar cells formed near the amniotic cavity. Both hypoblast and epiblast layers together form a flat disc like structure that is termed as bilaminar germinal disc.

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Into which structures do the trophoblast cells of the developing embryo, differentiate?  a)   The developing foetus  b)   The yolk sac  c)   The placenta  d)   The blood vessels  e)   All of the above
Which of the following statements is incorrect?a. The placenta secretes hormones such as progesterone, hCG, and estrogen.b. Embryonic tissue and maternal tissue forms the placenta.c. The chorion supplies nutrients to the embryo by diffusion.d. The umbilical cord is formed by one artery and two veins
During the embryonic developmen, the trophoblast will developed into  Select one: A. The embryonic disc B. The chorion C. The amnion and amniotic cavity D. The yolk sac
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