PSY 302 Chapter Notes - Chapter 2: Inner Cell Mass, Amniotic Sac, Cardiotocography
Document Summary
2 - prenatal development and the newborn period. Epigenesis: the emergence of new structures and functions during development: coined by aristotle, still highly influential today. Developmental process: periods of prenatal development. Germinal (conception to 2 weeks): begins with conception and lasts until the zygote becomes implanted in the uterine wall. Embryonic (3rd to 8th week): following implantation, major development occurs in all the organs and systems of the body. Development takes place through the processes of cell division, cell migration, cell differentiation, and cell death, as well as hormonal influences. Fetal (9th week to birth): continued development of physical structures and rapid growth of the body. Increasing levels of behavior, sensory experience, and learning. Embryo: the name given to the developing organism from the 3rd to 8th week of prenatal development. Fetus: the name given to the developing organism from the 9th week to birth. Stem cells: embryonic cells that can develop into any type of body cell.