section 9 - Psychology Sections 9 (Modules 31 34) + Module...

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Sections 9 (Modules 31 – 34) + Module 8 February 1, 2012 Definition of development Sequence of age related changes that occur between conception and death Prenatal Development Prenatal period: stage of development between conception and birth Stages of prenatal development o Germinal stage: Conception – implantation; approximately first 2 weeks Zygote – a single celled fertilized egg Blastocyst – a bundle of cells Stage ends when blastocyst implants on uterine wall o 3 crucial support structures form after implantation Amniotic sac filled with amniotic fluid: Regulates exchange of fluids, cushions against environmental shock and temp changes Placenta: Passes oxygen and nutrients from mother to baby, gets rid of waste Umbilical cord Tube with blood vessels that carry blood between embryo and placenta o Embryonic stage: 3 rd to 8 th week past conception Called an embryo Placental barrier is semi-permeable Teratogens: agents (ex: chemicals, viruses) that can cause harm to prenatal organism Fetal Alcohol Syndrome (FAS): physical and cognitive abnormalities in children of women who drank heavily during pregnancy Organogenesis: all major organ systems are formed Sexual differentiation begins Miscarriages most common in this stage o Fetal stage: From 2 nd month until birth Called a fetus Rapid growth occurs Maturing of organ systems Age of viability
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This note was uploaded on 02/28/2012 for the course PSYC 86-407 taught by Professor Vandellen during the Spring '08 term at University of Georgia Athens.

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section 9 - Psychology Sections 9 (Modules 31 34) + Module...

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