PSYC 2510 Chapter 11: Human Development Across the Lifespan
18 Jan 2017
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Document Summary
Development is the sequence of age related changes that occur as a person progresses from conception to death. Prenatal period extends from conception to birth, usually encompassing nine months. Divided into 3 periods: germinal stage(2 weeks), embryonic stage(2 weeks to 2 months), fetal stage (2 months to birth) Germinal stage includes the first 2 weeks after conception. The placenta is a structure that allows oxygen and nutrients to pass into the fetus from the mother and waste to pass out. Embryonic stage is when the organs and systems begin to form in the developing organism called an embryo. Embryo around 2. 5 cm long but looks like a human. Fetal stage is when the fetus starts to move and develop sex organs during the 3rd month. During the final 3 months brain cells develop at a fast pace. The age of viability is when a baby can survive a premature birth (22-26 weeks)
