An introduction to the process of development, beginning with fertilisation and covering the stages of blastocyst formation, implantation into the uterus, gastrulation and its constituent cell movements, neurulation and the role of the notochord, and the beginnings of organogenesis. We also discuss the differences in gastrulation between protostomes and deuterostomes, along with the many specialised structures found in amniotes to protect the growing embryo from drying out. We conclude with overview of some of the genetic mechanisms government the development process, including Hox genes and their role in governing genetic regulatory networks. Recommended prelistening is Episode 25: Tissues, Organs, and Systems.
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