PSC 140 Chapter Notes - Chapter 3: Congenital Heart Defect, Low Birth Weight, Apgar Score
Document Summary
Germinal period: the period that begins at conception & lasts until the developing. Fetal period: the period that begins in the 9th week after conception, with the first signs. Cleavage: the series of mitotic cell divisions that transform the zygote into blastocyst. Heterochrony: variability in the rates of development of different parts of the organism. Heterogeneity: variability in the levels of development of different parts of the organism. Totipotent stem cells: cells that have the potential to grow into a complete embryo. Implantation: the process by which the developing organism becomes attached to the. Amnion: a thin, tough, transparent membrane that holds the amniotic fluid, and. Chorion: a membrane that surrounds the amnion & becomes the fetal component of the. Placenta: an organ made up of tissue from both the mother & the fetus that serves as a. Umbilical cord: a flexible helical structure containing blood vessels that connects the.
