Embryology of the head and neck

Peter J. Taub; John M. Mesa

doi:10.1007/978-1-4614-8341-0_1

Embryology of the head and neck

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

Abstract

Following fertilization, the fusion of two haploid germ cells, a diploid zygote with 46 chromosomes is produced. Mitotic division produces two daughter cells, each half the size of the original cell but containing the full complement of genetic information. Subsequent divisions produce a solid mass of cells by the fourth day ("morula"). As fluid accumulates within the morula, one group of cells accumulates on one side ("embryoblast") while the remaining group of cells surrounds the periphery ("trophoblast"). This new cystic structure is named a "blastocyst" (see Fig. 1.1). The outer trophoblast layer, from "tropho-" meaning nutrition, will become the placenta following implantation in the uterus by day 6. The inner embryoblast layer will become the embryo.

Original language	English
Title of host publication	Ferraro's Fundamentals of Maxillofacial Surgery
Publisher	Springer New York
Pages	3-14
Number of pages	12
ISBN (Electronic)	9781461483410
ISBN (Print)	9781461483403
DOIs	https://doi.org/10.1007/978-1-4614-8341-0_1
State	Published - 1 Jan 2015

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AB - Following fertilization, the fusion of two haploid germ cells, a diploid zygote with 46 chromosomes is produced. Mitotic division produces two daughter cells, each half the size of the original cell but containing the full complement of genetic information. Subsequent divisions produce a solid mass of cells by the fourth day ("morula"). As fluid accumulates within the morula, one group of cells accumulates on one side ("embryoblast") while the remaining group of cells surrounds the periphery ("trophoblast"). This new cystic structure is named a "blastocyst" (see Fig. 1.1). The outer trophoblast layer, from "tropho-" meaning nutrition, will become the placenta following implantation in the uterus by day 6. The inner embryoblast layer will become the embryo.

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Embryology of the head and neck

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