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- The cells of the embryoblast differentiate into the ______ andthe ______.a. epiblast, hypoblastb. cytotrophoblast, syncytiotrophoblastc. amnioblast, epiblastd. epiblast, cytotrophoblastDuring gastrulation, cells from the _____ layer of the bilaminar germinal disc migrate and form the three primary germ layers. a. notochord b. hypoblast c. epiblast d. mesoblastThe placenta is formed from ________.a. the embryo’s mesenchymal cellsb. the mother’s endometrium onlyc. the mother’s endometrium and the embryo’schorionic membraned. the mother’s endometrium and the embryo’sumbilical cord
- The inner cell mass of the blastocyst is destined to become the ________.a. embryob. trophoblastc. chorionic villid. placentaMatch the germ layer on the right with its contribution to the tissues and organs of the embryo, on the left. v connective tissue stroma A. mesoderm v parenchymal cells, e.g., liver B. ectoderm C. mesoderm D. mesoderm E. endoderm F. endoderm vasculature v innervation v epithelium of enteric secretory duct tubes v epithelium of integumentary system G. ectoderm v elastic membraneLayer A is called _____X________, and ______Y________ develops from this layer. Select one: a. X Y Ectoderm Nervous system b. X Y Endoderm Nervous system c. X Y Endoderm Lining of the digestive tract d. X Y Ectoderm Lining of the digestive tract
- Somites develop froma. paraxial mesoderm.b. intermediate mesoderm.c. lateral plate mesoderm.d. head mesenchymeThe folding of ectoderm on the top of the embryo during organogenesis produces...? Group of answer choices a. somites b. the archenteron c. the neural tube d. the gastrula e. the blastulaDuring embryonic development, unique cell layers develop into specific groups of tissues or organs during a stage called ________. a. the blastula stage b. the germ layer stage c. the gastrula stage d. the organogenesis stage
- Which of the following structures develops into only the fetus? a. Inner cell mass b. Trophoblast c. Blastocyst d. ZygoteWhich of the following structure develops into only the fetus? A. Blastocyte B. Zygote C. Trophoblast D. Inner cell massWhich 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